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There seems to be grass growing on my live rock. There also seems to be bubbles in the grass. What is this? I tried to do some reading but couldnt find anything. Should I be concerneD?
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=3780&N=2004+113177
Thats the light i was talking about. It's just a regular 20" across 10 gallon tank.