I have a question about, you guess it purple algae. To begin with I uncovered my pool and there was a lot of debris and green algae from our weird winter in Virginia. I have a mesh loop-loc cover on the pool.
My initial pool chemistry readings were FC 1, CC 1.5, PH 7.2, TA 70, CH 90, CYA 100+. I had all intentions to begin working on the pool and then the rains came, and it rained, and it rained and it rained. Since my CYA was way over the limit, I knew the only option was to drain off half the water. After I had already dumped 2 gallons of 8.25 % chlorine in, to begin slamming I did this over this past weekend, while battling more rain.. The water came this past Monday, while it was raining, again. On Tuesday I noticed a darker color of what I though was algae, I didn't get back to the pool until yesterday Wednesday. Here are my numbers. FC. 5, CC 0, PH 7.4, TA 50, CH 60, and CYA between 60 and 70. And now I have what I believe is purple algae. I can only assume the water delivery brought this in, the water came from the local fire department which is on public water. I had read that manganese could be the culprit, never had the problem before this! But before I go crazy buying chemicals I thought I would ask for advice here, it would be most appreciated.
My initial pool chemistry readings were FC 1, CC 1.5, PH 7.2, TA 70, CH 90, CYA 100+. I had all intentions to begin working on the pool and then the rains came, and it rained, and it rained and it rained. Since my CYA was way over the limit, I knew the only option was to drain off half the water. After I had already dumped 2 gallons of 8.25 % chlorine in, to begin slamming I did this over this past weekend, while battling more rain.. The water came this past Monday, while it was raining, again. On Tuesday I noticed a darker color of what I though was algae, I didn't get back to the pool until yesterday Wednesday. Here are my numbers. FC. 5, CC 0, PH 7.4, TA 50, CH 60, and CYA between 60 and 70. And now I have what I believe is purple algae. I can only assume the water delivery brought this in, the water came from the local fire department which is on public water. I had read that manganese could be the culprit, never had the problem before this! But before I go crazy buying chemicals I thought I would ask for advice here, it would be most appreciated.
Based on your last set of test results which were rather normal, I also suspect you have manganese in the water. You'll probably want to use a sequestrant like "Metal Out". You might like to read these threads if you haven't already:
