I had a Hayward for 4 years. It is faulty from the factory in the design of the o ring on the ring of the lid. every time you open and close the lid the o-ring streches until it streches to the point of not sealing. i would go through two per season. I kept taking them back to Leslie's and claiming they were faulty. so i never paid for them, but just got fed up. I to bought a rainbow 300 two seasons ago and it works great. Use the 1" pucks though, they seem to disolve better than the 3".
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