I use a Hydros dosing pump for ATO and a modified Intllab pump for AWC. The AWC pump runs three times a day. I changes out 833.3 ml each time. It has dual pump heads so it removes and adds water at the same time. Below is a photo of the pumps. The lower left pump is the AWC pump. The lower right pump next to it is the Hydros and is the ATO pump. The one above the ATO is used to dose All For Reef. These are in the garage 35ft from the tank. The three pumps above are spare pumps at the moment. The top shelf assembly is for a tank that is not yet setup.Which dosing pump do you use and it it used as a water change throughout the day at a minimal amount or you run it on and off? Is that even possible?