I think someone suggest this on here already but posted pics to share it. I didn't have a pre-filter and it was driving me crazy with reduced flow every 2 days from plant debris.
I finally solved it with a super cheap, PVC pipe adapted to the pump with holes drilled in it. This cost $15 for PVC and connectors. PVC pipe is 1/2 inch, with cap and 3/4 inch treads connected to threaded 1" adaptor to the pump intake that had threads.
I finally solved it with a super cheap, PVC pipe adapted to the pump with holes drilled in it. This cost $15 for PVC and connectors. PVC pipe is 1/2 inch, with cap and 3/4 inch treads connected to threaded 1" adaptor to the pump intake that had threads.