Funny that 6% Sodium Hypochlorite from a grocery store will bleach your liner, but no other chlorine-containing compound will, huh? Gotta love the pool store rhetoric. I'm sure that they believe what they tell you, they are just informed by the chemical companies and their bosses and co-workers. It's pretty tough for them to discredit Sodium Hypochlorite when their own product has the same stuff, so the "other" ingredients must be the trouble. I mean, after all, it's not "pool chlorine", it's bleach. Sakes! How's a poor pool store owner to stay in business, after all?
Nope. Same stuff. Just stay away from the 'designer' bleaches, as they do tend to have undesirable junk in them.
I recall back when I was 14 years old (some 34 LONG years ago) when I was helping to clean our olympic-size school pool. It was drained, and we scrubbed the concrete with stiff push-brooms and a solution made from mixing the chlorine granules with water. I don't know what they were using for chlorine back then, I assume it was di-chlor based solely upon what I know now, but it made quite an effective bleach. It SERIOUSLY took out a perfectly good pair of blue jeans and a tee shirt. I'll admit that they were pretty cool with the splatter bleach job, but parts of them were just too eaten to live long, and I had to pitch them. You can bet that solution would have bleached your liner too...
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