the flatworms can leave a toxin behind after they die.i take half the water out then treat with flatworm exit.then suck up as many as i can before filling the tank again.don't leave any more dead flatworms in the tank than you have to.flatworm exit has never killed anything in my tank but once i big time over dosed it and it paralized all the bristle worms and starfish till i did a water change.
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55 gallon reef with 4x54 watt t5,29 gallon sump,red monti cap,1blue echinophyllia,trumpet,red lobo,2 toadstools 1purple and 1neon,gsp,xenia and yellow xenia,red ,many mushrooms,2 giant frilly shrooms,cabbage coral,yellow polyps,many zoos,1 orange and one neon green nepthia,duncans,cladiella |