Re: Introduction, Specifications and a Question
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My water has gotten cloudy again.
Since the last algae cleanup I got the water sparkling clean and made sure I tested the water every morning and evening, focusing on the chlorine levels (using the K-2006 Taylor test kit). Since July 1st, the lowest reading I've gotten was 6.0 free chlorine. Since my CYA has been 30 up until last week, when I increased it to 50, I figured it should be more than enough chlorine according to the best guess chart.
We've had our trees cut down this past week with the last day of work being on the 18th. Some sawdust settled to the bottom of the pool, probably a six inch circle, which I vacuumed up. On the 18th, we had a heavy bather load followed by some rain on the 19th. After the rain, the water became cloudy...although mildly. On the evening of the 18th, my FC was 8.0. On the morning of the 19th, the FC was 7.5. I dumped a little chlorine in the pool when the rain started, since my last algae outbreak happened during some rain. In the evening of the 19th, the FC read 9.0. I did my best to make sure the FC didn't drop too low.
Today, the water is very cloudy - blue in color, with a hint of green. I'm on day 2 of treating it with bleach, trying to keep it at 20ppm. Brushing, Vacuuming, etc. go along with it.
My numbers, as of this morning:
FC 20.0
CC 0.0
CH 290
TA 100
CYA 50
pH 7.4 (before the chlorine shock)
I'm going to do an OCLT tomorrow morning to see if I'm still losing chlorine overnight. I'm confident I'll get the water clean again, but I'm concerned I'm either doing something wrong or missing some fundamental step or understanding.
I had thought that keeping the chlorine levels at 6.0 or higher would prevent the algae from returning, but that appears to be incorrect. I'm wondering what I'm missing? I'd like to prevent this from happening in the future.
I probably haven't provided enough information to determine the cause, so fire away if I have neglected to include some details.
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