09-27-2006, 12:14 AM
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Sorry, I thought you were still cycling your tank at the time, but I noticed you had the tank running for about a month.
Actually, the 1" per gallon is typical guideline. It actually only applies to narrow bodied fish, like tetras, danios, livebearers. Wide bodied fish, like angels, discus, etc. require more space, and may fall under 2" of fish per gallon.
Danios do not really eat algae discs that much. It's best to just feed them flakes, with a variety of other foods, like frozen stuff. If you do not see the fish eating the algae discs, but you see it gone, it's usually the discs dissolve.