Ran into a few problems with original drain screen. Thanks to the chat room (especially Anchor Puller) I came up with this rig. It is a modified cup scrubber. Works fine. Cheap too.

Built my own timers for water circulation. Cheapest ones I could find on the internet were 30 bucks. My cost was $0.00 for the ones I built (I already had the parts). If they break, I can fix them. I placed the circuit in a piece of pvc and sealed it with marine sealant to water proof the circuit.

Thanks for all the input. I will find out how it really performs when the warm weather returns.