kdklovesfish
Aquarium Advice Freak
Don't boil it! I have heard that it can cause weaker parts of the rock to explode and send shards flying. I'm not sure if this is realistic, but threat was enough for me. I use all kinds if rock in my tank (after soaking and the vinegar test) and have found that while they do raise the ph a bit at first, it seems to level out. I'm don't think any of my rocks are limestone though. I have always gone with the idea that I'll try and then take it back out if it doesn't work out. You can always do a large water change to balance things again!!
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