Hi guys I have had my 65l tank for approximately six months, I have let it cycle and slowly I have added 10 tetras since this one of my fish has not been to happy hiding all the time and now just sits on the bottom of the tank looking like he's out of breath!
I have done a test and the nitrates were slightly high, I've done a water change and appears to have lowered.
Any idea what else I can do? Or what's wrong? Here is a picture of my little fella.
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