wow, didn't expect so much info on this thread.
I manage to lower the hair algae in my tank by:
turn the driftwood up-side down.
get 5 ottos from my other plant tank over to help.
dose 1/2 the recommended excel daily.
I am not sure which one help but get rid of 50%+ of the algae.
FYI,
I fertilized using the EI method in this
thread
The DIY CO2 supply is very constant to the best that I can.
I'm trying to get the pressurize system for my big tank and probably hook up too.
Thank all for your help.