Also, if PoolDoc or one of the others does advise a flocculant later, maybe they can offer a good choice brands. Waiting a day at this point isn't going to make much difference, and it is much easier to add something tomorrow, than to remove something you shouldn't have added today. POP means Pool Owner Patience - that's a term that I learned here. I've often heard that lack of POP is one of the biggest problems pools have.