I've been involved in a few discussions about this, and the result was that most people that have used urea have had absolutely no negative results. Positive results are pretty subjective, but I believe *technically* nirtrogen from urea is more readily available to plants, so again, *technically*, urea is a better option.
Why we all use KNO3, I don't know except that we all operate off that conventional wisdom that urea or NH4 will cause an algae bloom.
This is, of course, in plant only tanks.
Why we all use KNO3, I don't know except that we all operate off that conventional wisdom that urea or NH4 will cause an algae bloom.
This is, of course, in plant only tanks.
