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I am very new to the pool world, less than two weeks. So when I got the pool I had the water tested, since the CYA was 104 the pool service guy said that the best thing would be to drain 35% of the pool so I did and it brough the CYA to 73 when I brough the water to another pool store for...

Just bought a house with in IG vinyl pool (stats below). Previous owner did not take care of it as well as should have. I already drained 30% of the water to get the CYA from 104 to 73. I took apart and cleaned out the entire filter and vaccumed all the green algae off the wall. Am going a...