JamesC

One question that has never been explained to me is why do some manufacturer's use ammonium or urea based compounds in their products as a source of Nitrogen. On all forums I visit it is drummed into you how adding ammonium and urea to your planted tank will create algae mayhem and that potassium nitrate is the way to go. Do the manufacturers know something? I even tried replacing potassium nitrate with urea keeping the N amount the same for several weeks but didn't notice any difference in plant growth nor did I suffer any algae outbreaks.

James