02-04-2009, 08:31 AM
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The green stuff sounds like blue-green algae, also called cyanobacteria. It's generally caused by low nitrates. It should come out manually pretty easily, you can also put the excel directly on it, that helps too. Nitrates can be increased by dosing or feeding a little more heavily. Try dosing excel every day and make sure you have good circulation throughout the tank. The brown stuff sounds like diatoms, generally appear in newer setups, that should go away with time, maybe get a couple otocinclus cats, they love that stuff. Are the lights t5 HO? If so, maybe back the lighting period down to 7 or 8 hrs, probably a good idea regardless. HTH!!