Interesting. You've got some pretty territorial clowns then, kind of odd for perc's too IMO .. haha. That sucks though, getting nipped every time you need to put your hand in the tank.
It sounds like your clowns are hosting a cave in your tank... they'll host pretty much anything.
Just out of curiosity.. do you know if these clowns are tank bred? Or wild caught?
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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