cuttelbone

will it raise the ph or hardness of the tank?
 
One more thing, how many pieces of cuttelbone should I put in a 29 gallon tank? I had 1 but it is dissolving so about half is left.
 
I just broke it up and put a small piece in at a time. Like 2 sugar cubes worth. Cuttlebone will cause PH to rise a little. That’s why I just put a little in at a time.
 

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