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During the entire swimming season, I tested water purification products. The tested products were Longafor, Algitinn, Equitall (coagulant), Multiekt 6 in 1, Equi Plus, Equi Minus. For a complete picture, I only didn't test Chloritex and Chloroxone. Hydrogen peroxide or perhydrol are sold only from hands, I didn't want to risk it and didn't buy it, after all, chemistry is a dangerous thing. I managed to purify the water in the pool without a pump and without a filter. Enjoy watching!