Automatic water changes on 25 gallon

[Reefie]

+1
Keep in mind that the pump that pumps water OUT will be more efficient due to gravity helping than the pump that pumps water UP and IN.

I had thought of doing something like this with my BC29, until I researched that. Too many variables to factor in to make it worthwhile.

Originally Posted by fishytime

methinks it would be a mighty fine balancing act.....trying to match flow rates of two different pumps will be tricky and I would suspect that you will be constantly adjusting and tweeking the times as the pump/hoses get dirty.....and then there is the "what ifs".....what if one of the pumps fail or doesnt start properly?....might be a flood or a return pump running dry waiting to happen.....that and mechanical float valves have been known to fail