When I start my pump it runs good and completely fills with water to the lid. I have great return pressure coming from the return jets. After a few hours of running my filter pressure goes from about a 9 to 15. During this time the flow coming from the return jets is much weaker and the pump is no longer strongly pumping water the entire way to the lid, maybe just 3/4th full.
Is the filter pressure causing this? Something is causing the pump to not pull water like it does when it's first started. Could I possibly have a leak on the return side? My water level has dropped roughly an inch just the past week. Seems kinda excessive for just evaporation. Is there anyway to check this? Ideas? Thanks