Ammonium and Urea for Nitrogen source - Fertilizing

kekon · 10-06-2009, 07:22 AM

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I still have the Ludwigia Glandulosa which sometimes grows fine and other times doesn't.

I saw similar effects and it seems better growth occurs when NO3 is lower.
Blyxa Japonica is a plantwhich really appreciates high NO3 levels; i've never had any issues with this plant. I grows like a weed at NO3 10 ppm or more but some plants are severely stunted.
I'm still waiting for my ordered circulation pump but i think it will not help much.
I noticed that NH4 and urea work better in very soft water. In harder water NO3 is better. Generally speaking it seems that the harder the water the more NO3 can be dosed without harming the plants.