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post #4 of (permalink) Old 12-28-2012, 09:56 PM
Seattle_Aquarist
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Join Date: Jun 2008
Location: Seattle, WA
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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
75 Gallon, 2X55W AH Supply CF 8800K, 1XMarineland Doublebright, 2X Marineland 350 Magnum; 45 Gallon Tall, 96Watt AH Supply CF 6700K; 30 Gallon Long; 2X36W AH Supply CF 6700K; 20 Gallon, 1X26W AH Supply LED kit; all with Press. CO2; (Calcined) Montmorillonite Clay
Greater Seattle Aquarium Society (GSAS)

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