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2006-10-22 09:09:37 · 2 answers · asked by plz help me 1 in Science & Mathematics Biology

2 answers

Hope this helps you

Click on this link for info...

1.) http://www.novalek.com/kpd63.htm

2.) http://www.globe.gov/tctg/hydro_prot_nitrate.pdf?sectionId=156

2006-10-24 12:36:13 · answer #1 · answered by dolphin_heart19 4 · 0 0

there are special kits for that at a pet store I believe.

2006-10-22 09:13:59 · answer #2 · answered by huckypeep2 5 · 0 0

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