how old is the aquarium? if it is old, it could be the "old tank syndrom" as you added a power head and it might have steared underneat the sand and released some toxic gas?
Quote:
Originally Posted by reefcat
I agree, I think I'll set up the skimmer and once the film isnt present ill start the powerheads up, thanks for all the advice, I'll update as the whole situation unfolds 
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