So I have been thinking of an idea. I don't know if it would work or if it is even a good idea. I have been thinking about finding an electric valve in plastic that I can hook up to a relay. When the relay kicks on the valve will open and my return would be split sending some water back to the sump. Thinking about having the valve open about an hour after the lights go off till about 2 hours before the lights come back on. If this is a good idea what percentage should I cut down the flow to my tank? 25%? 50%? Any ideas?