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Old 04-15-2008, 01:49 PM   #1 (permalink)
Brian
Senior Aquascaper
 
Join Date: Mar 2008
Location: comerio
Posts: 203
Default The Cyanobacteria can be caused by poor or old light?

Hi friends. My tank is infected with cyanobacteria and I dont know the cause.

I make 50% water change 4 days back
water temp 27-30C (extremes)
old spiral bulbs 9 months old
I use Excel overdose
I have CO2
I use Cycle (the tank was alredy cicle but I add Cycle after that)
The substrate is 2 weeks old Eco complete
Plants healty, I use flourish
The only algae is cyanobacteria

I wonder what is causing cyano.
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