Hi @Zeus. and Everyone,That reminds me - I need to update my thread that deals with Urea. In a nutshell, it hasn't been a success for me. I've decided that dissolved organics only seem to give me grief. And urea is NH2CONH2 after all.
I finally got round to doing the deed:
Aquarium Plant Fertilizers - Sources of Nitrogen
Hi all, Much better to look at commercial specifications available in Europe: eg from Source Chemicals.... There is some discussion of this in . Personally I wouldn't use the urea intended for "de-icing", but any fertiliser grade you should be absolutely fine. You get a lot of using urea...
www.ukaps.org
JPC