 Re: Against the advise given.
Just to add my tuppence worth - I know absolutely nothing about keeping aquatic plants, but i have seen fertilizers especially for them. the biological processes and rates involved in soil fertilizers breaking down are a bit different to that of water. The urea you mention is actually something you find in pee, so you could pee in your tank much more cheaply! ;D Only kidding ! Its quite good for gardens because it doesnt disappear too rapidly from the soil. Trouble is that in your tank it could very easily break down to ammonium - at the rate you suggest you could be OK but i would keep a very close watch on the NH3/4 levels |