Rated 4.2 out of 5 by 5
Rated 5 out of 5 by soccerstud Excellent Product
So after a month of use. I find this ato outstanding. Not a glitch at any time. It keeps my sump filled to the right level at all times. There is no need to be spending unnecessary money on high dollar products. I use a Aqua Lifter pump with it to do the top off on a 29 gallon reef tank. I use black hose so that no algae grows while the water is transferred. I no longer hear a gurgle sound when I come home meaning its time for a top off and I've gained some time back from having to continue to fill and fill all month long. If your wondering what I have it filled with is 3 gal of RO hooked to the line.
January 22, 2015
Rated 5 out of 5 by JimV Outstanding
So after two weeks of use. I find this ato outstanding. not a glitch at any time. It keeps my sump filed to the right level at all times.There is no need to be spending unnecessary money on high dollar products like the tunze ato. I use a aqua lfter pump with it to do the top off on a 180 gallon reef tank.
November 2, 2014
Rated 4 out of 5 by WarptekBob Missing Some Features
The unit works as advertised. IT really needs a adjustable timer setting for 5-10 second run time on the pump. It always overfills sump. Doesn't effect running of it but for the price they could have added adjustable timer.
June 19, 2016
Rated 4 out of 5 by JosephR Bang for your buck!
When searching for an ATO (Automatic Top-Off) system, three goals were in mind:
1. Easy on the wallet.
2. Predominant use of sensor-based technology vs. unreliable float switch(es)/moving parts.
3. Reliability; stress-free set-up and operation.
The product is well-packaged and includes instructions -- in multiple languages-- that are clear and concise and easy to follow; this makes device setup a breeze!
Note that special attention to correct sensor orientation during setup is advised, as denotative markings on the sensor itself are mere raised letters of indistinguishable color: Black-on-Black. Improper sensor placement will trigger the ALARM -- A moderately-loud; incessant--'Beep!' This 'Beep!' is reminiscent of a 90's beeper, or the tone of a home microwave.
Note also that this product is NOT UL listed. This is certainly a factor when considering insurance for higher-end aquariums, or potential livestock, aquarium, and/or home damage due to product malfunction.
Purchased alongside this product was the HYDOR Universal Pump (Seltz L20). This combination is ideal, and advisable, as the 50-watt AC connection for the top-off reservoir pump is compatible with this product. More importantly, the minimum run-time for the ATO unit is 25 seconds, and the Seltz L20 provides flow adjustment for easier calibration.
Note also that the distance between sensor positions MIN, MAX and ALARM is approximately 3/8 in. This short distance in water level sensors is effective at maintaining a more stable salinity in Saltwater Aquariums; thus, a correctly-sized, adjustible reservoir pump is paramount. A pump NOT manufactured by HYDOR may not function well, or fit the given 50-watt pump outlet, lacking male and female receptacle holes.
Note also that the unit's sensors are temperature-differential based. Calibration takes 10-20 seconds, and operation is very accurate; however, significant concern for device failure is warranted with any Electronic Temperature Probe. Replacement of the water level sensor is impossible, as it is hard-wired to the ATO unit itself.
Drip loops on ALL aquarium-related wiring is advised, or you may indeed get a 'BANG!' for your buck! In the product's defense: The power switch is housed in a -- 'gummi-like'-- rubber and the device housing appears to be competently water-resistant.
Thus far -- 2-week usage period-- operation is smooth, hassle-free, and reliable. The product deserves a 4-star rating for its accuracy, functionality, and cost-effective price-point. Safety and reliability are of significant concern, but this product satisfies the search for a short-term ATO solution. Long term... we'll see. I have my fingers crossed.
The price is definitely unbeatable! Thanks HYDOR for considering the pocketbook in a hobby full of overpriced gadgetry! When operating on a modest budget, this is a product that can't be beaten!
December 18, 2013