hey guys need a little help. I believe I may have a case of mustard algae... about a week or 2 ago I was having some trouble keeping chlorine in the pool. was trying to adjust my CYA level because it was sunny and hot. did ONCL test and ended up slamming the pool. Chlorine loss problem cleared up nicely and everything was great. Saturday I vacuumed out the pool and it was spotless. The next day I had what appears to be more dirt on the bottom. thought I had stirred up the dirt and it had just settled out so I vacuumed it out again. the next day I had more. checked my filter by adding a little DE to it while looking for it to blow back into the pool but none came out the return so it looks good I also cleaned my solar cover the best I can to make sure there was no dirt getting in that way. Tonight it looks like someone sprinkled a whole bunch of dirt in the pool. Solar cover has been on and nobody has been in the pool for 2 days now because it has been cloudy and raining. what's confusing me is when I added chlorine last night I tested and the FC level 7 PPM and CC at 0 ppm 24 hours later FC is 6PPM and CC is still 0 PPM. my CYA was at 45 the other day may be slightly lower due to rain. I am thinking I have a case of mustard algae that I didn't get when I slammed last time but if I do have mustard algae wouldn't it be eating chlorine like crazy? Is that possible? My chlorine loss of 1 PPM over 24 hours would suggest that there is nothing organic living in the water. the water still looks fairly clear but there is a bunch of **** on the bottom that look like dirt but appears to be multiplying.
FC 6.0 PPM
CC 0 PPM
CYA about 45
FC 6.0 PPM
CC 0 PPM
CYA about 45