I dropped some muriatic acid on the rock. The black part of the rock doesn't fizzle. The white part seems to sizzle slightly after a few seconds (maybe 5-10 secs). My ph is already pretty high around 8.0 and my ph tester doesn't read higher than that. I use tap water. Should I use a different water source?
My tank is a 29 gallon and plan to get corys, neon tetras, and a few other fish. Is it safe to use in my tank? Anyone have experience with this rock?
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