I just shot my first dose of Vibrant in my 200 gallon bare bottom tank. Have Dinos like crazy. I have spent weeks blowing off my rocks (like DNA suggested), and running high flow to get the crap to the sump and through my UV light. UV doesn't seem to kill it fast enough. All my tank parameter numbers are perect.
Crazy thing is I'll start blowing offf the crap and dino bubbles from the rock at one end of the tank and by the time I get to the far end of the tank the bubbles are back where I first started. Seems like the more you agitate them with a turkey baster, the faster they come back. Going to try vibrant for awhile, if that doesn't work I think it will be time to take up another hobby.
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