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mistergreen · 05-16-2007, 08:47 PM

I use a calibrated API test kit.. I did tests against known numbers from our local waterwork's annual report { from the tap : NO3 is around 1.3ppm, PO4 is around 0.14 ppm }

What I'm saying is in a mature tank, NO3 & PO4 will naturally exist if you feed the fish but not to the amount where you recomment for optimal plant growth. Are you saying it's impossible for PO4 to exist without adding PO4 ferts?

Mine really does hover around 2ppm PO4 without dosing PO4.

05-16-2007, 08:47 PM	#37 (permalink)
mistergreen algaevore (View User Tanks) PTrader: (3/100%) Join Date: Dec 2006 Location: Cincinnati Posts: 5,202	I use a calibrated API test kit.. I did tests against known numbers from our local waterwork's annual report { from the tap : NO3 is around 1.3ppm, PO4 is around 0.14 ppm } What I'm saying is in a mature tank, NO3 & PO4 will naturally exist if you feed the fish but not to the amount where you recomment for optimal plant growth. Are you saying it's impossible for PO4 to exist without adding PO4 ferts? Mine really does hover around 2ppm PO4 without dosing PO4. __________________ Algae happens. Last edited by mistergreen; 05-16-2007 at 11:31 PM.