1. Stop using "shock" bags. Almost everything sold that way is a witch's brew of dichlor or cal hypo PLUS 3 or 4 other, often useless, chemicals.
2. Find out -- even approximately -- what your stabilizer level is. A greenish cloudy pool requires a chlorine PPM level equal to, or greater than, 1/4 (25%) of the CYA level!
3. Use bleach till you know what's in your pool. Cal hypo adds calcium . . . which you may not need. Dichlor adds stabilizer . . . which you may not need. If you can't buy 10% "Pool Chlorinating Liquid" (available at most super-Walmarts) buy PLAIN 6% bleach. Non-Clorox brand is best, since Clorox is putting additives in most of the bleach they sell.
4. Post your pump and filter models. You almost certainly need new -- and probably better -- filter cartridges. It's not normal for well-operated pools to be cloudy.
5. If your pool water is truly a witch's brew from past chemicals added, consider draining and refilling if water is not too costly. But ONLY IF THE GROUND IS DRY -- fiberglass pools will 'float' out of wet ground in a heartbeat! Plan to do this AFTER you are ready to do the chemistry, testing, and filtration . . . the RIGHT way.
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