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We opened our pool three weeks ago. Two problems. First, the level of free chlorine remains at 0.13 ppm, despite my adding seven gallons of Clorox and two bags of shock. Secondly, the CYA level remains at 25ppm, despite my adding 16 oz of CYA powder and one gallon of "stabilizer". This is the...

Opened our 24,000 gallon pool two weeks ago. At opening, CYA reading = 10, on test strip and using R0013. Gradually added all four pounds of Robelle 2604B Stabilizer. The package claims it is 100% CYA. No change in the CYA level. Shall I continue to add Stabilizer?

Two days ago, I shocked my pool. I had to raise the FC level to 12 ppm in accordance with the measured value of CYA. Today, the FC level was still at 9ppm. CC level is 0.5. I have read that the FC level should be in the range 3 - 5 ppm for safe swimming. How do I reduce the FC level quickly...

The female thread for the bottom drain plug of my Pentair CCP320 cartridge filter is stripped. The symptom is that as I turn the plug to tighten it, it clicks and no longer advances. I bought a new drain plug. Still a leak. I wrapped the threads with teflon tape. Still a drip. I went so far as...

The plastic drain cap plug on my CCP320 filter is way too difficult to reach and remove. Also, mine survived four removals before the plastic nut stripped and it impossible to grip and remove. Before investing $35 in a new flimsy plastic one, I thought I'd poll the forum to see if anyone has...

I'm about to add household bleach to my pool in the amount given by the calculator. What is the preferred method of adding this liquid? Into a skimmer? Around the sides of the concrete pool wall?

I'm new to cartridge filters. I see videos of people cleaning the cartridges by hosing the outside of the pleats. If I understand correctly the circulation in my filter, flow takes place from the outside perimeter of the cartridge toward the inside. If this is so, won't directing the hose flow...

My pool is permanently cloudy. The chemistry measures normal. Pentair Clean and Clear filter. 10 micron cartridge filters. Yesterday, because the pressure in the filter had increased by 10 pounds, I pulled the cartridges and hosed them. Two hours later, the pressure had again increased by 10...