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778 Posts
That is cyano.
Go back to basics, ensure you have 20ppm nitrate, 2ppm phosphate and plenty of potassium. Then add your traces every other day. Stabalise CO2 at 1ph drop between the photo-period start and end and keep kH at around 4dkh. Aerate at night to ensure excess O2 at night and make sure you have a nice medium circulation to prevent any 'dead spots' in the tank.
The BGA will disappear.
Go back to basics, ensure you have 20ppm nitrate, 2ppm phosphate and plenty of potassium. Then add your traces every other day. Stabalise CO2 at 1ph drop between the photo-period start and end and keep kH at around 4dkh. Aerate at night to ensure excess O2 at night and make sure you have a nice medium circulation to prevent any 'dead spots' in the tank.
The BGA will disappear.