I have cool blue diamond brite pool. Someone recommend me 99% trichlor granular + brushing to remove lots of stains on pool bottom. Is this safe? Will it destroy the blue color in my diamond brite?
1) can you tell what kind of filter I have in the pic below?
2) how can I know that it is running properly?
3) how often do they last, and how often do they need to be checked?
I have dozens of these brown stains... then I have yellowish bottom discoloration... and to top things off a white deposit(calcium?) on the wall that I was unable to brush out... HELP
I've got all the essential chemicals.. calcium hardness, total alkalinity, pool shock, etc. But they have been sitting around here for several years. Still usable?