12-01-2010, 07:10 PM
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Originally Posted by Byron
That is green dot or spot algae. Not much will eat that, even snails; I think someone on here once mentioned a plec (can't remember which species) sometimes eats it. I get it in my 115g tank on the front glass but if I clean the glass every week during the water change I rarely see it. Even though I can't see it at the time, the beginnings are obviously there, because if I don't clean the glass sure enough by the next week there will be a few spots visible. A plain sponge-type scraper run over the inside of the front glass will suffice. If you do see little spots, it is hard to remove and usually you need one of those sturdy little scrapers; sometimes a razor blad if really bad, but be careful not to scratch the glass.
It occurs due to light, although obviously other issues are involved or I would have it in more than just one tank. It will not be a problem if you remove it and then keep it from coming back with a weekly clean of the glass.
No algae will harm fish; on plant leaves is the problem as it will kill the leaf and if it continues to spread the plant will die. Except for the green spot algae, most can be kept within reason by balancing the light and nutrients for the plants. Reducing light works if the other types get out of hand.
Well crap, I was afraid the final answer would be that I just have to clean it. Guess that's what I'll do! What about the darker stuff coating the plants? Not much will eat that? Have to do it by hand also?