yeh i 've got the same in my tank, i cover parts of it over for one day with shells or something, then either remove the shell and clean or if its not covered just move it to a dif location. this seems to kill it although how effective long term is another question.
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45g,Flat back five sided tank 24\" d. 50lbs lr, 35lbs ls. Magnum Can filter, 250w hqi m/h 10000k, 2 p/h 1200 & 400,brains, leathers, xelias, gs polyps, bubble, tons of critters hermits, snails,starfish, scallop, few fish and tons of algae
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