Rock effects on PH overblown?
So I picked up some rocks locally from a garden center and decided to test them with vinegar. After smashing them open I added some vinegar and heard some fizzing - which online research would say is bad for aquariums. I decided to test my seiryu stone and that fizzed just the same, if not a little louder and that's been fine in my tanks.
Do PH raising properties even matter considering planted tanks usually have a 30 or 50% water change weekly? I can see being fearful of copper in the rock, but is some calcium carbonate that dangerous?
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