If I had an 8ac pond that was 100% sealed with very little terrestrial growth near the pond, 50-60gpm would do if 1/8" is average evap and you still have a run off source. If you can't rely on any inflow then 100gpm would be needed or slightly higher. 5" domestic case won't carry that much and cost will be 5 fold.
We have a community lake here with 10 surface acres, with evap and a bit of leakage, 250-300gpm brings it back to full pool running about 1 week per month. No inflow other than actual rain.. we have a 14" annual rainfall and 7-15% humidity is common here.
Last edited by Snipe; 01/27/22 01:21 PM.
