Peppermint bristlenose very pale help!

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bjtaylor

Aquarium Advice Apprentice
Joined
Apr 28, 2010
Messages
49
Specs of the tank are 90g water is spot on 0 amm and nitites, 20-30 nitrates. Residents are
2 peppermint bristlenose (one about 3 inches the other about 2)
5 clown loaches(each around 2-3inches)(one is also recent addition about 2weeks)
4 neon tetras
3 glass shrimp

Woke up a couple of Mornings ago and found one of the peppermints really pale and inactive. He appeared to get better during the day, but then again at night and the next morning get really pale. This is continuing. I have no realize the temp in the tank has been getting really low in the morning and day as it is getting cold now. I think the sudden temperature change has been cause the paleness, but there is also patched on him when he has his proper color that are pale/bald looking. Could just be my imagination or is there something else happening here? I bought some melafix on a whim but don't realy know what it is used for so haven't used anything yet. Any help and suggestions are welcome.
Pic included of the peppermint


image-3880528288.jpg
 
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