Chin, I had all type of algae growing on my rock not too sure what the names ar but one was red bubble type that anchored itself to lr good you couldn't get it off with a knife even so I took my sea urchin out of the reef and put it in within a week all the algae was gone so save your 150 spend 14 on an urchin and when you're done sell it. they're awesome at keeping the tank clean eat every agae I had only problem is when they get big it's a pain after I got pricked I sold it but am planning on getting a small one in a month or so cause the algae is slowly growing back!
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