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A MUST for larger tanks with large evaporation rates! By RandoReefer on 5/7/13
RandoReefer would recommend this product to a friend
After upgrading to a 125g tank with a 30g sump, I noticed my evaporation rate upgraded also. One week of manually topping off 1.5gal per DAY, was enough for me to pull the trigger on this ATO.
I really trust the sensor on this system! I was close to buying the JBJ Auto Top Off but I'm so glad I put up the extra money for this one. It is sleek, provides a variety of setup options, VERY Accurate, and easy to setup. I gave it 4.5 stars, because it could have used a few more directions or a FAQ section.
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Why didnt i get one sooner! By Jason on 5/1/13
Jason would recommend this product to a friend
I finally made this purchase and its a life saver!
comes with everything needed (except water container).only issue is the
eye sensor gets micro bubbles on it when first installed which causes it to pump water continiuosly till high level alarm shuts it off.best advice is clean sensor with vinegar and let it sit in your sump for a couple days then its trouble free.
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The best hands down. By Alex on 4/13/13
Alex would recommend this product to a friend
Tunze osmolator top off is the best system you can buy. Well worth the price, comes with its own pump and has 2 different technologies working flawlessly to protect your tank and home from a flood.
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great ATO By illya on 4/13/13
illya would recommend this product to a friend
This is my second unit i'm ordering, first one was about 2 years ago. This is for a second setup, the first one is doing great. The one problem with these is the power plug. After sometime it becomes corroded and you get strange errors like overfill alarm wont stop. But if you have any problem the first thing to do is take off the 2 screws and clean the port and the plug. I cut a nail file down to about 1/8" to clean the port, and just a drill bit to scrape the plug inside. worked great and im good for another 6 months at least. At some point i'll just solder the wires and never deal with it again.
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Worth every penny!!! By Steven on 4/4/13
Steven would recommend this product to a friend
You do get what you pay for... Keeps my water level constant. Love the optical sensor they use on this system. No brainier to install. Now all I need is to make something to hide the top off container...
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awesome product By brian on 4/4/13
brian would recommend this product to a friend
I recently upgraded my 60 gallon reef tank to a 180 gallon. With my 60 I just topped off the old fashioned way but that was getting to be a chore with the new tank. I was on board with purchasing an auto top off but had serious concerns about failure...particularly in the on position. Virtually every other ato product out there was peppered with negative reviews regarding failure. We have thousands invested in the tank so it was worth it to spring for the osmolator. Piece of mind and very easy to setup. Skimmer works a lot better to.
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Amazing By Dan on 3/27/13
Dan would recommend this product to a friend
Probably one of the best investments I have made in this hobby. A really solid product.
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Excellent product By P Duffles on 3/25/13
P Duffles would recommend this product to a friend
I'll simply agree with the multitude of people praising this ATO. This thing literally changed my life :D
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The best By FISHY on 3/25/13
FISHY would recommend this product to a friend
The best thing that you can do to your tank.
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Good Top Off Bad Instructions By Mike on 3/25/13
Mike would recommend this product to a friend
The instructions on this top off could be WAY easier to understand if it didn't have 6 different languages on each page. Also, it should also state in there that you need to soak the opitcal sensor in soapy water and gently wipe off the polishing residue on the sensor before installation, also there is a dial on the inside of the controller that you need to set depending on the size of the aquarium or sump that you place the sensor in, the dial basically sets the dosing the pump pumps water into the tank/sump. A little better instructioni pamphlet would give this product 5 stars!
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Great product!! By Bosley on 3/15/13
Bosley would recommend this product to a friend
I have this running on my aquarium and it is spot on and fail proof . the back up plunger has not been activated Probably because the top off system works so efficient, Great product recommend to anyone who is tired of adjusting or just having other systems that fail.
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Not Cheap..you get what you pay for By Curtis on 3/10/13
Curtis would recommend this product to a friend
Best ATO available
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Love It!!! By Troy on 3/2/13
Troy would recommend this product to a friend
You get what you pay for, and this ATO is awesome!!! Easy to setup and fail safe. Great quality.
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Serious about reefing? Get this! By Chris on 2/28/13
Chris would recommend this product to a friend
One of the smartest purchases I've made. Expensive but made with quality and plenty of mounting options. Highly recommend!
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Worth the Investment By JOHN on 2/24/13
JOHN would recommend this product to a friend
I was a little apprehensive about spending this kind of money on an ATO. From the moment I opened the box I recognized the quality. Works perfect, provides piece of mind, and everything you need is included. Previously bought JBJ but was disappointed due to lack of redundancy. This should be fail proof with dual sensor/float valve.
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Tunze ATO By Toby Flenderson on 2/23/13
Toby Flenderson would recommend this product to a friend
Pros: works perfectly, precisely, the German way.
Cons: hard to fight off all the ladies who want to get there hands on my tunze.
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best topoff out there By chris on 2/18/13
chris would recommend this product to a friend
This topoff is the best there is. I replaced my jbj with this and am so glad I did. The optical sensor with a float is pretty much fail safe and my water level stays the same.
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Love it! By Joe on 2/13/13
Joe would recommend this product to a friend
I've never had an ATO system, but this unit is awesome! I had no problems setting it up. Sure, the instructions MIGHT be lacking a little, but I don't feel the complaints below are justified.
The main sensor monitors the water level and activates the pump. The other one can be used as a safety shutoff/alarm OR as an alert that your ATO reservoir is empty.
It's your choice!! I, personally, set it up in the latter form and the product works great.
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Terrible By Pissedreefer on 2/1/13
Pissedreefer wouldn't recommend this product to a friend
This product sucks end of story
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Perfect! By Calvin on 1/15/13
Calvin would recommend this product to a friend
after lugging around water for a few months i decided to get this along with a large storage container to relieve myself of water duties every morning. works great ! only have to top off the container once a week !
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Once it's going it's great! By Terrie on 1/11/13
Terrie would recommend this product to a friend
I have to come back and review again only b/c I gave it a 3 getting frustrated with the set up. The instructions are more for someone familiar with ATO's..not me.. this is my very 1st one. I finally found a forum 3reef that someone had posted full details with pics and was able to get mine going. Had I had any knowledge at all about what I was doing this would have been a 5 minute setup! Now I know, it's done, wow it's simple!!
It is not even letting and 1/8 of the water out before it tops it off... This I like!!! I pray for longevity for this price :)
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??? By Terrie on 1/10/13
Terrie would recommend this product to a friend
I have to say I can't even give this item a rating yet. I received it a couple days ago and looked at it, put it back in the box and read the instructions. I took it out again and my head is spinning. Again today I took it out and my head is spinning. I'm trying to see the dark picture examples, I've read and read the instructions 10 times. For someone who has NEVER had an ATO of any type I chose this b/c of the good ratings and being BRS recommended. I figured I'd just spend the $ the first time instead of being someone who went less inexpensive and regretted it. However, like I said I've NEVER had an ATO of any type.... THIS THING NEEDS REAL INSTRUCTIONS FOR INSTALLATION!! I don't know what the parts are called so reading the long drawn out instructions isn't helping, the pics are too dark, and I can't find anything on the web!
Frustrated!
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Great until it failed By Guy on 1/8/13
Guy wouldn't recommend this product to a friend
My Tunze 3155 is almost 4 yrs old, but just recently failed. After a short while it stops working and the TOO HIGH led is on while the TOO LOW led is flashing. I have to cycle power to reset it but it faults again shortly after the reset, no matter if the water level is good ( green led on) or low. I communicated with Tunze and the controller needs to be replaced. I find it difficult to have to pay for a complete controller unit (including sesors) just to replace the controller. Very expensive, almost the price of a new 3155. Plus I find this is not a rare occurance - easy to find others with same issue on the web. A super nice unit when it works, just too expensive to my taste.
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COULD NOT LIVE WITHOUT IT!!! By Sherri on 1/8/13
Sherri would recommend this product to a friend
I have never owned an ATO, but this has to be one of the best. I have no complaints whatsoever. I would recommend to everyone who runs saltwater tanks. Worth every penny and would repurchase again if needed.
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It's worth the money... By gmastr85 on 1/6/13
gmastr85 would recommend this product to a friend
I can't compare this to other top off systems because this is my first, but I have zero complaints about this one. It comes with everything you need. The instructions are pretty easy to understand, and you can be setup and running fairly quickly. From opening the product to the small amount of assembling and reading the instructions, to filling your top off bucket and hooking the system up, you can be setup and running easily in under an hour. It even has a backup sensor on it incase the electric eye fails. You can't go wrong with this system. Pay the extra money and get this! Your system stability is well worth the price!
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Great Product By Robert on 12/30/12
Robert would recommend this product to a friend
I love this, water level and salinity stay at a constant, and the water level sensor is much more reliable then a float...
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Just buy it By Tim on 12/24/12
Tim would recommend this product to a friend
If you're wondering whether this thing is worth it...the answer is yes. After 7+ years of daily top-offs and getting neighbors to come in when we're away, I finally decided to get the osmolator. Wish I had done it years ago. Works as advertised.
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Accurate when it works By Ryan on 12/22/12
Ryan would recommend this product to a friend
I have had this since February of 2012 and have problems with it monthly if not a few times a month. When it doesn't stop working it keeps the level and salinity in my aquarium perfect. However, it continues to stop pumping water and the level will drop too much. I will then have to unplug the unit in order to reset it. I have contacted tunze about this and they have told me to check the contacts to make sure they are clean. They always are. Have yet to remedy the problem. If the unit would continue to operate constantly I would be giving the review 5 stars.
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Neat By Ryan on 12/22/12
Ryan would recommend this product to a friend
Tunze osmolator is really easy to set up the only negative thing i can think of is when getting the pump started for the first time i had to give it a little shake to get it going. Very precise and i don't feel nervous leaving the house with it having a safety float switch. I drilled two holes in the side of a bucket towards the top to put the lines through and have a threaded lid on it that i got from lowes.
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No more lugging top off water around By Nick on 12/7/12
Nick would recommend this product to a friend
Very easy to set up. Only problem that I had was getting air bubbles out from bottom of pump upon first start. I put mine in a water storage container from a pet store instead of a bucket so I couldnt fit my hand in and turn the pump upside down to get the air out.... a little shake of the wires and bingo, that is my only gripe but other then that its very nice knowing that I can go days without having to fill a container for top off water
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Dont know why I waited so long By UCFKnightFan on 12/4/12
UCFKnightFan would recommend this product to a friend
Great product after having to top off a gallon every day and worry about tuning my skimmer this product has been a no brainer. What caught my attention was the magnetic setup. I dont need to worry about suction cups or hang-on the side mounting. I used it in my baffled sump.
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So much easier than daily topoffs! By Pat on 12/2/12
Pat would recommend this product to a friend
I was really getting sick of adding water to my tank every day. This is the answer! Easy to install and so far works exactly as it should.
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Plug and Play... By Jerry S. on 12/1/12
Jerry S. would recommend this product to a friend
Nice ..... but beware of operator error, the tank sump cannot be lower than your reservoir or it will back siphon.
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I feel better now By Susan on 11/29/12
Susan would recommend this product to a friend
I finally set this up on my tank after waiting because I thought it was going to take too long. I was so happy to find out set-up took 5-10 minutes and now I have reliable redundancy on my tank.
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Awesome By Andy on 11/28/12
Andy would recommend this product to a friend
This thing is extremely reliable and precise. Love it.
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Would not have a reef tank without this! By Greg on 11/18/12
Greg would recommend this product to a friend
Keeps water level stable along with salinity. One sensor and one backup float valve are included for peace of mind. Overflow sensor and alarm are a great addtion to my setup. Trusted unit!
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Replaced my jbj auto top off By Thomas on 11/17/12
Thomas would recommend this product to a friend
I had some issues with my jbj auto top off unit and decided to try the osmolator. I can't believe the difference in quality! My only issue with this unit is that when the system comes back online it primes itself. If you are using kalk then it can add more to the system then the normal dosage
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Great product By vaetist on 11/16/12
vaetist would recommend this product to a friend
Best. ATO system it's ready to use , it comes with everything , worth money
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I didnt think they could improve on an amazing product By CLee on 11/12/12
CLee would recommend this product to a friend
I have one of these units about 10yrs old. They havent changed much but havent had to as the unit just works. The new one comes with 2 magnet setups which back 10yrs ago when i bought my first one it didnt have. To put this in perspective I had to tweak this thing (clean/adjust) maybe 3 times in 10yrs. This is amazing. It just doesnt fail. Ordering 2 more right now.
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great unit By chi on 11/11/12
chi would recommend this product to a friend
the post problem free and reliable thing in my setup
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Great the second time around! By Dave on 11/8/12
Dave would recommend this product to a friend
My first one got fried in a lightning strike, it was super touchy! I was very frustrated with it, almost tried another ATO. The second one is bullet proof.
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Why get any other? By Ben on 11/7/12
Ben would recommend this product to a friend
I just purchased this, as my first ATO. I realize it is a little pricey, but in this hobby, you get what you pay for... I have been contemplating on what to get for months, after hearing from so many people that wish they would have went with this in the first place, I just decided to get it. I am glad I did. It is incredibly easy to set up, with little reading of the directions, I probably spent more time drilling through my stand than actually setting it up. it is pretty much a "plug and play" device, and it will come with everything you need. I ordered and picked up from BRS within a hour, as always the service I got once I was there was great.
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Easy to use and Reliable By Ali on 11/2/12
Ali would recommend this product to a friend
Replacing the water evaporated form your tank is a chore and nightmare for every one in the hobby. so when it came for me to setup my 120 gallon tank this was one of the first piece of equipment i got for my reef. i must say simple to install and reliable it has never failed on me or flooded my basement. if you want simple reliable this is for you.
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nice By Joe on 10/28/12
Joe would recommend this product to a friend
Bought this after getting fed up with making top off water everyday. A little pricey but it comes with everything you need and is easy to set up. The optical sensor is nice and was a selling point for me.
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GRRREAT PRODUCT By harry on 10/14/12
harry would recommend this product to a friend
I have had saltwater aquariums for 20+ years. Iwork offshore and overseas.I have to depend on someone to check on my tank on a daily basis to add water. This Product was very easy to set-up. I tested it by turning off power, removing water and adding water, and it works great. This tank can go a week without supervision now...Probably the best piece of reef equipment i have ever bought.....Well worth the price!!!!
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Best ATO By Chris on 10/13/12
Chris would recommend this product to a friend
Seems like lots of money compared to some of the other ATO but it's worth it. Nice to have something that is reliable and gives great piece of mind that it's just going to work.
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no issues By james on 9/22/12
james would recommend this product to a friend
I've had mine for over 1yr. It's never given me the slightest hiccup.
I use a small reservoir for top off water (2.5g jug). My jug has run out of water on a number of occasions. The pump included in this unit is very durable. I think most other pumps would of been smoked by now.
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Works Great as an RO/DI ONLY Top Off By Toby on 9/21/12
Toby would recommend this product to a friend
Works great as an RO/DI ONLY top off but I would not trust it to top off with KALK. The optical sensor works great! This product will help you enjoy the hobby.