It depends imo, chlorine and whatever else may be in your tap water means nothing if you're growing in soil. I'd think it may actually be helpful in hydro, all I read about is people adding H2O2 or pool shock to their hydro water, ph of course is important in hydro but it's not even a word in a soil grower's vocabulary.
Here's another perspective for soil growers and water quality. Many of us outdoor growers have used puddles, lake/pond water, collected rain water, anything we can get our hands on and don't have to carry to remote grow locations. Plants grow just as well with that water.
My area has really high chlorine in the water, strong enough you can smell it out of the tap, smells like a pool that was just shocked. These 2x 15gal plants were grown with tap water straight out of the hose and Jack's Citrus, nothing else all the way through to harvest. Never checked ph, let the water sit or filtered it in any way. They eventually pulled 29 zips dry between them.
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