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Was just in the store, and 10% bleach gallon is up to $4.60. I added 1 of these every 2 days to keep my 13k gallon above ground at 3-4 ppm last few yrs. Then I noticed they had a 5.5lb a "shock" powder which was 52% cal hypo. This was $20. Label on the back says add 5.2 oz (I assume daily)...

Hi, I have a 24' round, 12k gallon vinyl above ground. I have this recurring algae issue, it's the classic green and only appears on the wall and where the wall and floor meet, and it's not everywhere either, worst on the south side. If I vacuum it, it will come back in about 7-8 days. I let...

Hi, 13500 gal above ground. Chemistry is good. Has been for weeks. Never let chlorine go below 2, fluctuates between 3 and 7 usually. But there is some staining and I'm not sure why. Can algae grow when numbers are good?

Hi, I have a 13500 gal above ground. My father used 2 25lb kettlebell weights to hold the ladder down. Worked great last year. However, this year, I have had a lot of trouble keeping both the CYA and chlorine levels up. Every week or so, there is a lot of rust-colored stain near the ladder...