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Originally Posted by Maven That's the thing, Salt, the impurities and their levels are unknown.
I see Dr. Quinn's post now. He made a list of what some of the impurities can be, I'm not sure of his source for it though. My own guess is this is only partial. |
And trace amounts are bad for plants?
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The impurities present in these chemicals can include acid-insoluble matter, alkali compounds, aluminum, ammonium, arsenic, barium, calcium, chloride, copper, fluoride, heavy metals, helium, insoluble matter, iodate, iron, lead, magnesium compounds, manganese, nitrate, nitrite, organic volatile impurities, phosphate, selenium, sodium, sulfate, and sulfur.
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14 of these are plant nutrients
The others cause little issue at low doses and plants are used for phyto remeditation for the remainder for environmental clean up.
I would think the trace amounts would be far worse for animal life.
Plants are far more resistent to these chemicals.
Salts like K2SO4, KNO3 etc are fairly pure as they have very high melting points.
Suggesting they have these without backing up how much or if it's significant in terms of toxicology to aquatic life is simply meaningless information that scares, rather than shows any significant impact on our tanks.
I've used the ag grade stuff for the food I eat(if it's good enough for us, it's good enough for my fish certainly), the tanks I grow and I've not found any issues I could possibly trace to these supposed issues that you and Dr Quinn have stated.
Simply try it and see, was there anything wrong with the ag grade to begin with? For a decade on 300 species of weeds folks have used these products with excellent health and growth. Now why should I switch?
Common sense can really go a long way and save folks a lot of $.
I don't need science to see common sense issues.
I already know there no issue with the ag grade products.
So do many other folks.
Regards,
Tom Barr
www.BarrReport.com