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added co2....algae covering tank


28 Apr 2009
Tank specifications - 65l
Lighting - 11w (soon to be 33w)
CO2 - diy yeast
Filtration - interpet pf2
Fertilisation routine - api healthy leaves...tpn+ on order

well last night i added my co2 system at the moments its very simple, it just bubbles from the tube into the bottom of my filter which seems to diffuse it well (im doing this until my diffuser arrives) i came home from college at around 12 today to notice the sides of the tank are covered in a dusty algae, ive scraped most of it off and done a 50
% water change. is this normal, what can i do to stop it?

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