Join Date: Dec 2003
Location: Philadelphia, PA
What did you try to raise as far as ferts go? What's your NO3 level?
I ask because as I'm sure you have read elsewhere, raising NO3 often makes easy task of ridding a tank of staghorn (the thick, clearish looking stuff). Shame it's not looking as easy in your case... New tank?
As far as Excel goes, I've had pretty good results ridding algae using the standard dose, it just takes longer... might be an option, specially if the tank is small, wouldn't cost much to dose Excel for a month or so... Not sure how effective it is on staghorn though, I have been lucky to date just raising NO3 to eliminate staghorn.
Hope you solve it!