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Re: Urea

> I assume if it's in low enough concentration the
> plants would suck it up and your biofilter would consume the rest before
> your fish bit the bullet.

Be careful... the line is very thin... it does not take much urea to kill the fish.

I will go for NO3 instead.  I do not figure that there is any
advantage using urea or NH3.

BC (Singapore)