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Hi, I have a very old pool and I think I got the dreaded mustard algae. is this it? egNLT7W2OpU how can I tell if it is dead? I went through SLAM again (second time in a row) and the water is crystal clear. last week I cleaned my sand filter and there were tons of this brown stuff coming out of...

Hi, I have been fighting green algae every year with variuos level of success. Swimming season is slowly starting here in Australia and I'm losing the battles already... I have an old 65000L concrete pool. It is covered with a floating blue (bubble wrap type) cover, practially all the time...

Hi. I have been fighting algae since I can remember. The water in my pool is almost never sparkling and fully transparent. Is it possible that my sand filter just first do the job properly? I cleaned it up a few days ago (garden hose from the top) and there was lots of Crud coming out. I had to...

hi, I have been following advice on this forum for a year or so. Thank you all for great help. Most of the summer (southern hemisphere) I have been fighting green algae. I did shock the pool at least 5 times this season which is I think quite a lot. Each time I had almost no CC but had to...

Hi, I have a little problem that perhaps have some simple explanation. According to poolcalculator to lower PH in my (50000l) pool by 0.2 I need to add 200ml (34%) of muratic acid. However in reality I need to add 500ml to get the desired effect. The pool is definitely not twice as big ;-). So...

hi, I'm new here and so far I was mostly reading and learning. Thank you for this amazing knowledge base! I have been struggling with my pool recently and slowly giving up. As far as I can tell the water is balanced ok but the pool is cloudy ( I can just see the bottom but barely) and I...