A couple of days ago the cycle repeated. I came out and noticed a yellow film covering most of the bottom of the pool. We brushed the sides and bottom (it's a vinyl pool) and again got a very cloudy pool (can't see the drain in the deep end). Water looks yellowish. I'm running the filter constantly to try to clear it up. Also went ahead and raised chlorine levels to shock values (20) and cleaned behind the pool light (it was really gross).

Just can't figure out how algae is getting in there since my chlorine levels are consistent. I suppose this could be mustard algae rearing it's ugly head. Any other ideas I should try?