Texas Holey Rock

gordonzoo

Non-member
Anyone got this stuff in their tanks? It's basically Lime stone that's been formed with water flow. It claims to raise PH levels. I believe it's popular with cichlids. My guess is that tank life would be fine around it but not on it
 
I think life would probably grow on it if it's just CaCO3. That's basically what live rock is, I believe.

One concern might be what impurities are tied up in the limestone.
 
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