Starting to see a small amount of cyanobacteria in my 55G planted. Curious to see if anyone has had any luck with 2 x dosing Excel to fix this (I can't seem to find a difinitive answer on this). Also, I still have a bottle of API Algaefix (would this have any impact on the cyanobacteria?). I'm thinking that the cause was an open window for a week (it was getting hit with direct sunlight for 2-3 hours a day =(. I've since closed the blinds and the tank is now receiving a photoperiod of 8 hours a day (2 x 48" T5NO 28w bulbs).
Also, I've read that BG algae doesn't do well where there are high levels of movement/circulation. The odd thing is that I'm seeing it grow on the leaves/rhizomes of my Java Ferns (where they're clearly getting movement). Anyways, I could really use some help guys (I'm still a newbie).
I have not found dosing of Excel / glutaraldehyde at 2X dosage to have any effect on BGA and in my tank it seemed to grow just fine in areas of high current.
is what worked for me; basically treat the cause by getting my nitrate (NO3) up and treat with Hydrogen Peroxide (H2O2).