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Thanks for the welcome, and the info!

Thanks so much for the quick reply. It makes perfect sense now!!

Thanks to all of you, the pool looks beautiful now! The chemistry seems to be adjusted properly and the water is sparkling. I have a question about the chlorine level. With a CYA of 80-90, (have not mastered that test yet) the FCC needs to be up around 7-8 if I recall from the chart. Is it safe...

Thanks to this site, I am learning so much about pool chemistry (and what pool chemical stores want to sell)...:-) Thanks for sharing all of your knowledge to help bring me up to speed. It's obvious how important knowing your CYA level is to maintaining the pool. I received the TFTest kit...

and the TFTest kit contains that CYA test, right?

thanks so much! the test kit should come today or tomorrow. can I get an accurate CYA test while the chlorine is still so high? (the kit I have measures in yellow, and I'm above the comparatives on the test into an orange color. It has gone from deep rust to orange so I think it is going...

Re: To drain or not to drain for Nitrates A couple correction from my post this morning...pool is actually 28,000 gal. I've put in about 20 jugs of Clorox over the last 4 days (8.25 %, 121 oz). I ordered the test kit from your site today. Just measuring on my kit it is way above the top 10ppm...

I have an in ground gunnite/concrete 32000 gallon pool in Maryland. Could not keep chlorine in. Treated for phosphates and confirmed they were gone. Had nitrate level of 15ppm. Pool store said that was causing the problem and I would have to drain and replace about 5-6 inches of water. The pool...