Originally Posted by Brian041
All of that algae is gone now. I'm back to green spot algae on the glass and plants as well as thick almost black algae covering my DHG and the edges of my wisteria. The green spot algae has completely choked out one of my really nice plants too. I've started using DIY CO2 and I've noticed the green spot receding a bit on some of my alternanthera reineckii though, so maybe it's starting to get better and just being slow about it?
Green spot is usually from too much light and/or low phosphate levels.
Whats your lighting and photoperiod?.