1in and 3/4in PVC Pipe Grilled Endcaps

So after built my fantastic aquaponics system, and introducing some dumb, but very cute tilapia fingerlings into the tank, I started finding my drains into the grow beds getting clogged.

After staring down the pipe, I notice eyes peeping back at me. Apparently the little guys got sucked right up into the inlet and got stuck at the valve!! Can't let that happen!

So shopping at Home Depot yielded very unsatisfactory results, so I just rolled my own.

These grilled endcaps fit standard 1"