Hello! I have a problem with my new (first) system. My fish tank is a small ~30 gallon. My bell siphon wont start unless I allow a flood and drain cycle of only ~6-7 minutes. If I reduce water flow the bell siphon won't start. I want slower flood/drain cycles. I wonder if this could be easily solved by adding a timer to the pump? Pump on for ~30 minutes, pump off for ~30 minutes. I have a small…