Hi again,
Thanks for all your help so far.
Just wondering...after I have had the activated carbon in the tank for a day or two should I take it out? Then what do I do? Should I do a partial water change? Test the levels? How will I know if my problem has been fixed?
Neon tetras are all still alive (thank goodness!) although I think a couple have lost a bit of colour.
Thanks
Tiffany
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