03-15-2009, 01:15 PM
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It will be fine I have a 55gal mbuna cichlid tank that has 5 pieces of volcanic reef rock from hawaii and all of my cichlids love it. Just before you put them in you have to pour boilling water onto the rocks ( DO NOT BOIL THE ROCKS IN THE WATER!!!) then you soak them over night in a bleach and water solution then rinse them, rinse them, rinse them, then soak them in plain water for a bit then rinse them again and then finnally put them someplace to dry completly before you use them.