The Planted Tank Forum - View Single Post - Miracle gro fertilizer?
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post #2 of (permalink) Old 01-29-2013, 03:38 PM
UDGags
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Probably no

Most contain urea (listed on back as ammonical nitrogen sometimes), which breaks down into ammonia.

And a good portion contain heavy metals, which are toxic as well. Check the contents of the one you want to buy here

http://agr.wa.gov/PestFert/Fertilize...ct1.aspx?ltr=M
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