Both biocube 29s ive owned have thrived and done well. With the current ive done three diffrent scenarios. 1st rubble which I took out, 2nd was MAcro which I took and replaced with the sapphire skimmer I bought from you. The tank is doing great, my corals are all multiplying and the fish are thriving. My only issue which im working on in cyno on the sand bed.

Are onyx clown more sensitive than normal percs or something because Ive kept a pair of percs in my last biocube with no problems. No I have a clarkii in this one.