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Brown spots on clown loach ? Help

Posted By: Matt
Date: Thursday, 7 October 1999, at 7:57 p.m.

Hello everyone . l need some advice . l have 4 clown loaches (only) in a 30gal planted tank . In the last 1-2 days, l have noticed than my smallest loach (2-3 inches)has developed a small number of brown spots over its face and down its sides . Is this fungus ? All 4 got ick about 7 weeks ago, and this one got it the worst (probably due to me not knowing enough about water chemistry) . l have a good biological filter in place with no ammonia or nitrite readings . Nitrate is at around 18ml per litre, Satisfactory . My mechanical filter is only cyling the tank once per hour, poor l know . l'm saving for a cannister filter . l try to keep the water clean, by removing debris and doing 20% weekly water changes . This fish has always had one or two brown spots on it's face , but now it has more . Any advice would be great . TIA