ktomminello said:Sorry for this barrage of questions- how long has your tank been running? Are there fish or any other type of critter in there? How big is your tank and what are you running it with (filtration type and gallon rating, underground filter, air pump rating, lighting etc that you know off the top of your head)? What is your test kit reading for levels?
Ok so nitrite snails or phosphate remover?
It's diatoms or brown algae as some call it. You can also just keep wiping it away but its rather a moot point since it will just come right back.