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Excellent By Roger on 11/20/2014Roger would recommend this product to a friendI've had this overflow for almost a year now. It works flawlessly. Easy to assemble and use.
Great Product By Bill on 9/7/2014Bill would recommend this product to a friendI have been useing this over flow for about 8 years. I just replaced it because the nipple for the vaccume pump broke off. I have never had a siphon break in all those years. When the power goes off, it starts up quickly and resumes the flow. If you do not have a drilled tank, get this product
quality product By Eric on 7/26/2014Eric would recommend this product to a friendPurchased this because I cannot drill holes in my tank. I was nervous when buying this because of it possibly failing, but it has been running constantly with no issues. When power goes out it drains into sump and when power comes back on the siphon restarts and works just like it should.
Good By Victor on 3/11/2014Victor would recommend this product to a friendI have the CPR102 on my 75 gallon with 40gal sump. I like how quiet it is, it does need a little tweaking to get it quiet My Skimmer is louder than this
Does the job By Reefer368 on 3/4/2014Reefer368 would recommend this product to a friendI have the cs 150 for my 125 gallon tank and 40 gallon sump it is awesome except for the fact that my system is hard plumbed and it is pretty loud with the gurgling of the water
Works great very happy with it! By Jorge on 2/24/2014Jorge would recommend this product to a friendWe are very happy with our choice and would say no problems at all with it.
CS90 Great product By O'D on 2/5/2014O'D would recommend this product to a friendI originally went the cheapest/ugliest route and constructed overflows out of PVC via DIY videos on YouTube. While they were indeed cheap, functional, and gave a sense of accomplishment, it just didn't look good, and brought a constant fear factor knowing the flaws of that system. I was toying with the idea of drilling the tank, but soon decided a HOB overflow would be the safest route. These overflows are great, but I would like to know how long the pump will last until it burns out...while the siphon remains despite the pump being turned off (or if it died), if the power goes out and then comes back on and you're not there to start the siphon again, you could easily flood the tank and cause big problems. I would definitely say the pros out weigh what little cons there are with this. I'm not having any noise problems, but if you do, there are videos for standpipes to help with this.
Not Happy By shawn on 12/20/2013shawn wouldn't recommend this product to a friendfirst of all, not thrilled that you have to add a siphon pump to make this thing work! Second if you hard pipe the unit it is very loud.All the adjusting in the world wouldn't stop the gurgling. I had to make two pipes that fit into the drains (thank god for you tube). Overall i don't think i would not recommend this to anybody that wants to hard pipe their systems.
Good option By Daniel on 9/19/2013Daniel would recommend this product to a friendIf your tank is tempered like mine and you don't have a reef ready design, this is your best option. Just make sure you establish a water level for both your tank and sump. If either your siphon fails or your pump turns off you could have an overflow in your tank or your sump [double trouble]. Also be sure to use a good ball valve or two on your lines to regulate flow... It makes a bit too much noise, and the pre-filter will clog eventually, so do your maintenance, and this will work well for you....
Best alternative to a drilled tank By Tim on 5/2/2013Tim would recommend this product to a friendI've been running this set up for about a year. As other reviewers have noted, the aqua lifter pump maintains and restarts the siphon even in the event of a power outage. So far, I've had no problems. A couple of notes: 1) As an added precaution, I drilled a 1/8" hole in my return just below the surface of the water. In the event of a power failure, this will stop the return from back-siphoning into the sump and overflowing it; 2) If you have the proper sized sump for your tank, you can tinker with the water level in the sump, keeping it low enough to accommodate water flowing back from the tank if the power fails. Nothing is fool- or idiot-proof, but if you follow the instructions and do the maintenance, this is the next best thing.
Deluxe CS50 with Lid By Chavinpat on 4/8/2013Chavinpat would recommend this product to a friendSolid craftsmanship. It isn't as loud as I thought it would be, just keep the cover on. Like many equipment, regular maintain is a must.
CPR CS90 Overflow w/ Pump By Christian on 3/21/2013Christian would recommend this product to a friendI love this combo. Gives me peace of mind that my overflow siphon will always be going, even if power stops and it has to restart. This unit is exceptionally quiet, but I may add a durso standpipe to mine.
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Previously Asked Questions
by john on April 20, 2014, @7:30 AM
how big should this box be for 125 gal tank
Bulk Reef Supply Hi John,
The overlow box just has to be large enough to accomidate the flow from your return pump. Without knowing how big your pump is I can't say for sure, but assuming its in the ballpark of 1200gph like most return pumps on a tank that size would be, the CS102 should do the job.
by Brian on July 21, 2014, @12:38 PM
Does the Aqua-lifter pump run continuously or does it have some a sensor to know when air is in the system?
Bulk Reef Supply Hi Brian,
The aqualifter runs continuously. Really there is no reason not too. There isn't a downside to running it and the last thing you want is for it to not run because of a malfunction from an extra sensor :)
by Owen on December 2, 2013, @12:23 PM
Can I somehow restrict the flow on the CS50 to 250gph?
Bulk Reef Supply Hi Owen,
You wouldn't want to restrict the flow on the overflow itself otherwise you run the risk of an overflow if something impedes it further (snail, algae, etc) but you can restrict the output of your return pump to 250gph. If 250gph is all that is pumping up the tank, then 250gph is all that will drain via the overflow. Its basically self replicating (up to the max size of the overflow) because it only drains the water that "overflows" into the overflow system.
by Shane on March 10, 2014, @8:10 AM
Perhaps a silly question but, now that I have my sump with CPR overflow up and running, how do I keep my floating fish food pellets(Spectrum) from being sucked into th overflow?
Bulk Reef Supply Hi Shane,
Its a good question and one that everyone with a sump faces. The most common solution is to turn off the return pump while you feed. Almost every controller on the market has a standby or feed option which allows you to turn them off on a temporary timer so if you have a controller that is the best route to go. Otherwise just pull the plug (just don't forget to plug it back in!).
by andrew on December 16, 2013, @9:51 AM
What size (or type) return pump would you recommend with this overflow? It would basically need to have about a 5' head height to reach from sump to tank. Thank you!
Bulk Reef Supply Hey Andrew,
It depends on which of the overflows you are looking at. As a rule of thumb though you want your return pump to be in the ballpark of 10x the size of your tank. So around 500gph for a 50g tank for example. Then make sure that your overflow is rated for a flow higher then whatever that number is. You don't want a 300gph overflow with a 500gph pump as that extra 200gph has to go somewhere (and it will be on your floor!).
by Debbie on April 30, 2014, @5:46 AM
In the event of a power failure when I'm not home, will the unit begin the siphon automatically when the power comes back on? Will there be any chance of overflowing my tank or system?
Bulk Reef Supply Hi Debbie,
The overflow is designed as such that the siphon is maintained in the event of a power outage. It won't "recreate" a siphon but it shouldn't lose a siphon to begin with.
DELUXE PACKAGE Includes:
- CS Siphon Overflow box
- Acrylic Lid
- Aqua-Lifter Pump
- Flow Rate: 300gph
- Outflow Size: 3/4" Bulkhead
- Width: 6"
- Requires approximately 6" of clearance on outside of tank
- Flow Rate: 600gph
- Outflow Size: 1" Bulkhead
- Width: 7.25"
- Flow Rate: 800gph
- Outflow Size: 1" Bulkhead
- Width: 9 3/8"
- Flow Rate: 1,200gph
- Outflow Size: 2 x 1" Bulkheads
- Width: 9 3/8"
- Flow Rate: 1,600gph
- Outflow Size: 1.5" Bulkhead
- Width: 9 3/8"
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