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I have a rust stain on the pool ledge about 2 feet under waterline... roughly in the shape of a 2ft x 1ft rectangle. It's a plaster pool with the pebbly looking surface. Fortunately I know what caused it. Some idiot used a Dremel tool to cut off the anchor bolts he used for the pool slide...

Help??? Another day of sunshine passed today and I tested the water around 9:30PM. FC: 20 PPM CC: 0.5 PPM pH 7.2 TA 40 PPM CH 410 PPM CYA 20PPM If photobucket images work, here is the OTO test: Here is the CYA test at a point where I could barely see the dot: And the corresponding...

Pool looks clear, but was hard to tell if it is still dull in the early morning light. This morning's results (Had to rush off to work so I couldn't do the full battery of tests): 28PPM FC 0.5PPM CC (very slight tinge of pink when I added the 2nd reagent.. may not have noticed it had it not...

Thanks for the quick replies. The quick test for Chlorine was very dark orange.. so much so that it looked like I should have been using the pH color scale. I did it twice cause I thought maybe I had mixed up the reagents it was so far off from the color chart. I'm 99% sure I used the 10 mL...

Pool looked a bit cloudy 5 or 6 days ago, and then 4 days ago (Monday) an algae bloom hit. Came VERY fast, possibly because the pool water temp was up around 95F due to the solar heater valve acting "backwards". Turned pump on 24/7 on Monday night and I put 3 jugs (576 oz) of 6% bleach into...