Ah, I see now. I talk about EDTA at 0.5% as the powder and you're talking about it as a diluted solution. You're still using more than I do -- you're using 1.25% as powder, but that's a more typical rate....
Correction -- I should have written: "...you're using about 0.8% as powder, but that's a more typical rate..."
That's what I get for trying to do math in my head. :think: