I was told that if you keep it trimmed back you don't have to worry about any negative effects on the tank. I feed little bits to my Naso tang and he loves the stuff. I have Cheato and the caulerpa in my fuge, the caulerpa starts to grow into the cheato so I'm always moving the cheato so I don't end up with a big ball of two types of macro algae. They both seem to grow pretty good under my 55w PC light but I think a little more wattage would be better.
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