Who Gives A Fish Forums

I've had similar issues before, and it turned out my tank was too clean. Nitrates at 5 are fine, but maybe try letting them creep up to 10 ppm. Also, are you dosing anything? A balanced trace element regimen can make a huge difference. I use Red Sea's Colors program and my millepora's been popping ...

Agree with the weekly changes. Also, keep an eye on your magnesium levels. I've seen Acros bleach out when Mg drops below 1250. What's your dosing schedule look like?