i know im putting this in the wrong forum but this is the most viewed so im posting here------i have a huge piece of driftwood in my 225gallon i have a 21 inch silver aro a 16 inch tsn redtail hybrid a comoon pleco about 12 inches and 2 paroon sharks about 14inches each the problem is i had the driftwood in my tank for about three months i started developing brown-greenish gunk on the glass and gravel the fish seem sluggish but eating well...i do regular changes and maintenance but this gunk comes back faster... is this driftwood the cause ive washed it scrubbed it soaked and boiled it but nothings changed----any ideas or should i just get rid of the driftwood all together