Re: Check inside my filter?
I have a cartridge filter...I don't know much about a sand filter. It does not look like what I have in my pool, does it brush away easily? I would almost say it does look like some kind of algae...From what I have read about mustard algae, it doesn't happen that frequently...But that does not look like that pollen dirt I have in my pool. If you think it is algae just raising your FC will not do it you will have to take it to shock level. I think I saw on your earlier post that your CYA was at 50...then you would have to shock up to 20 ppm FC and keep it there. Have you done that? It can't hurt if you think it is algae.singerteacher said:How do I check inside my filter? I've never opened it up!