I use this for ATO. It's set it and forget it. Dial in total amount you want to add to sump each day and it dispenses it in 150 equal portions. No need for float switches, and almost no possibility of inadvertently adding too much KW to sump. And if power goes off, there's no need to reset it. Worth the extra $ for the peace of mind. (Posted on 2/12/12)

I am using this for automatic water changes from my basement. What a great product, never have to carry heavy buckets up and down stairs for water changes... (Posted on 1/2/12)

Though there are less expensive top-off systems, I wanted something that was reliable, foolproof, and could also pump a great distance/height. My water supply is in the basement, so I simply drilled a small hole to pass the waterline. The system is reliable, and has no float valve to worry about. It is simple, and works great. I have since added a second litermeter and several remote pumps for supplements. (Posted on 11/10/11)

Great pump system. Using for ATO and Auto water changes. Worth the extra buck... (Posted on 4/13/11)

The LMIII is a high quality doser. I use the base unit and another pump for 1% daily automatic saltwater exchanges. I pump fresh saltwater from a 55g barrel through 15 ft of standard 1/4" poly tube into my sump. The second pump pulls old saltwater out of the sump and pushes through 30 ft of tube to my garage utility sink. The LMIII calibration capability ensures equal amounts out and in, keeping specific gravity stable. The small additions don't require temperature adjustments. LMIII is a must for the automated system. Now if they would just make an interface to my Apex controller. (Posted on 12/11/10)

I have owned this product twice, when it comes down to my tank I want low risk and high reward, that's what you get with this product. This is work horse folks, also the price on BRS is a great value as well.... (Posted on 10/26/10)