If you start adding chemicals and buffers you will open a Pandora's box and forever have problems. .
I agree with new tanks. I was speaking in terms of established tank with bad algae problems.
GFO(phosban media) does work...buffering PH is not a bad thing and a necessary thing with GFO... we do this all the time in marine world.
So just to clear my last post up. I am speaking in terms of established tank having major algae problems.. not the new start up ...doing what I mentioned would probably slow cycle time.