Public Pool Flow & Turnover Problem

[watervale]

[ Note to posters: this is a public pool. Very different rules apply! PoolDoc. ]

LOL. Inherited responsibility for neighborhood non-profit. 3 feet at one end, 10 feet at other.

County requirement for turnover is 6 hours. Pitot flow meter shows 80. Not sure if it has enough horizontal length to be accurate, but if it's anywhere close, we have low flow.

Pumps are 1.5 to 2 feet above water and about 8-12 feet from water's edge on the shallow end. I'll have to go by tomorrow and look up the models. I was up there tonight putting a snake in the skimmers. 4 of them and only 1 has decent flow. Baskets float up. Didn't find any blockage (yet).

One pump doesn't have bubbles, one has small ones. I don't see any bubbles in the water coming out from the returns.

Filter pressure (on top) is 10-12 psi. Goes up to about 15-20 after 1-2 weeks without backwashing. I put the pumps on recirculate and don't see any improvement.

BTW, this forum is phenomenal. I didn't know zilch about pools 4 months ago. I've fixed a ton of problems in 3 months -- balanced the water with BBB, fixed the chlorinators, replaced the sand, etc, etc, etc with the information here. Thanks a ton everyone!!!