I turned to this forum last summer when I had a terrible algea problem that took several weeks to clear. We finally had clear water again after some following the directions on this forum and switching to liquid chlorine / bleach. We had been using a Pool Frog and shocking with the bags of pool shock and ended up with a high CYA (over 100). After researching this site we discontinued the Pool frog. Around this time we also purchased a new Sand Filter and pump. My husband got tired of cleaning the cartridge and was convinced that this was part of our problem with getting the algea to clear after shocking.
So, the rest of the last season was pretty much trouble free except I was noticing that I was seeing more sand/dirt on the bottom of the liner - it would settle in spots. I would brush it but it would never seem to clear. We have had the pool open for 2 weeks now and the water has been in good balance and clear after initial shocking. Although it is still pretty cold here in MI for swimming, the kids have only been in it once. I have vacuumed and brushed but these sand/dirt areas seem to be more prevelant. I didn't notice this so much with the cartridge filter so I'm thinking the filter must be putting sand back in to the return - is this possible? Any suggestions for getting rid of it. I've got crystal clear water but the bottom is dirty - looking.
Test Results on 5/28:
Added 1 bag of pool shock to increase CYA
Test Results on 5/29
Test Results Yesterday 5/31:
Any other suggestions?