I have had the unit work well in my 20 gal nano tank but sometimes the sensor gets invaded by a snail and causes the tank to overfill and my salinity goes to crap! By Louy on 3/27/2013
Louy would recommend this product to a friend
What this unit really needs is a way to double up on the fill sensors. That way if a snail gives one a ride it would not cause the tank to overfill and ruin your salinity. In other words, the unit would have to recognize when both sensors are calling for top off water to come on.
well worth the money By Chris on 3/25/2013
Chris would recommend this product to a friend
well constructed, and love the ability to use in many different ways.. I can't believe, I went so long with out one...lol
Simple By Ryan on 3/21/2013
Ryan would recommend this product to a friend
The JBJ ATO is a very simple design. It has a nice looking control module that nicely mounts to the inside of my tank stand, hidden but still up off anything that might get wet. The only drawback I had was that there was no good way to mount one of the sensors in my RODI reservoir so it kind of just floats around in it.
Grea, with small set-back By Tommer on 3/12/2013
Tommer would recommend this product to a friend
This is a great ATO switch. The only thing that I don't like is that the ATO checks every ten seconds to see if it is full and then turns off. So on a smaller tank that not turning off for possibly 10 seconds might cause salinity swings.
Works Perfectly By djwally13 on 3/11/2013
djwally13 would recommend this product to a friend
I installed the JBJ ATO over the weekend, it doesnt come with a pump so I purchased a Toms Aqua lifter pump from my local fish store. The unit works perfectly, I check my water level every morning and the level is always at the line I drew on the side of my sump.
Worth the $ By shirtlessbill on 3/1/2013
shirtlessbill would recommend this product to a friend
pretty simple idea and thus simple enough to instal. The only complaint I have with this is there arent any instructions in the manual describing the level at which the floats are activated. took me a few minutes to find the "sweet spot".
Other than that this has been a worthy purchase. keeping my SG steady as opposed to dumping a gallon of water everyday is the first step in keeping a healthy reef. Many thanks to JBJ
Good item By Jeremy on 2/2/2013
Jeremy would recommend this product to a friend
I like this unit a lot. Makes it easy to use and also a must if you have a sump.
Simple top off By Thomas on 1/8/2013
Thomas would recommend this product to a friend
I have had this on one of my tanks with a Toms aqualifter for about 1 year now. Has always worked flawlessly, the aqualifter is a perfect pump for it as its quite,doesnt back siphon, there is no danger of burning it up either. the JBJ controller is easily adjusted for sump level and pump maximum run time.I Would recommend this for anyone looking for a reliable auto top off system
Cheap, reliable and works By Kyle on 1/2/2013
Kyle would recommend this product to a friend
Way cheaper than competition but does not show in its quality. Works great so far and does what it needs to do..top off.
unreliable for me also By 241wrasse on 1/2/2013
241wrasse wouldn't recommend this product to a friend
Low cost is nice, but in this case you get what you pay for, & I'd rather pay a little more for an important function.
Went on vacation for a week, thank God I had a tank sitter - he found the sump water level dangerously low 3 days into my vacation, with the return pump spouting tons of bubbles into the display tank. Good thing the return pump didn't run dry - would've fried it. Could've gone the opposite way, with the ATO pump running until it overflowed the sump!
Randomly it'll quit working - pump light is on but pump not engaged, confirmed the pump is fully functional. ATO box has to be powered off & back on, usually it'll reset back to normal the first time it's power-cycled.
Update-Bad Buy By Ron on 12/28/2012
Ron wouldn't recommend this product to a friend
This is an update to my review below. Initially was having problems with it automatically timing out randomly when it would turn the aqualifter on. Was leaving for vaction for three weeks and had no time to get a replacement. Worked around it by having the reefkeeper turn it off an reset it every 45 minutes. I've been monitoring it by cam while I'm on vacation. 10 days in, I wake up this morning and log in and one of my water alarms is going off. It has failed now in the on position. Every 45 minutes when the reefkeeper rests it, it's kicking on for the max of 14 before it times out. Can't tell if my floor is flooded yet and had to make an emergency call to a friend that's been checking on the tank to head over and unplug the damn thing. Total junk, thanks JBJ. If you are using this, I highly recommend you don't rely on it to go on vacation.
Simple and Effective By Joseph on 12/27/2012
Joseph would recommend this product to a friend
Easy setup and works great with 1/2 hose and MJ1200. Dont forget to get a pump when buying this. After research I decided not to go with the aqualifter pump due to head pressure and friction loss in tiny tubing.. Get a better pump and this unit and your set.