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Seattle_Aquarist · 12-28-2012, 09:56 PM

Hi xev11,

I wouldn't risk my fish; a lot of the commercial fertilizers for garden use contain very toxic heavy metals. For example the first one on your list - Miracle Gro Organic All Purpose contains:

Arsenic - 3.43 ppm
Mercury - .0054 ppm
Cadmium - .838 ppm
Lead - 1.80 ppm

I would not risk my fish to try to save a couple $$ on plant food. I suggest using Seachem products or if you have several tanks or large tanks dosing using the EI method using the proper chemicals.

12-28-2012, 09:56 PM	#4
Seattle_Aquarist Planted Tank Guru (View User Tanks) PTrader: (26/100%) Join Date: Jun 2008 Location: Seattle, WA Posts: 2,043	Hi xev11, I wouldn't risk my fish; a lot of the commercial fertilizers for garden use contain very toxic heavy metals. For example the first one on your list - Miracle Gro Organic All Purpose contains: Arsenic - 3.43 ppm Mercury - .0054 ppm Cadmium - .838 ppm Lead - 1.80 ppm I would not risk my fish to try to save a couple $$ on plant food. I suggest using Seachem products or if you have several tanks or large tanks dosing using the EI method using the proper chemicals. __________________ *Roy* 45 Gallon Tall; 96 Watt AH Supply CF; 6700K; & 30 Gallon Long; 2X36 Watt AH Supply CF; Press. CO2; UGF; Heat Treated Montmorillonite Clay Greater Seattle Aquarium Society (GSAS)