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It's fine for your tank. I add 1/4 teaspoon per 20 gallons once
a week with a 50% weekly water change. This adds roughly 15ppm
extra of K+.
It's fine, I used the same brand for a number of years.
> From: Naomi Mizumoto <naomizu at pacbell_net>
> Subject: GreenAll Sulphate of Potash...
> Okay - I KNOW this has probably been discussed to death, but I
> somebody will forgive my laziness and provide me with an
> answer, here. I
> bought something called GreenAll brand Sulphate of potash. I
> presume it's
> safe to use, but I'm just not sure how to dose. If somebody
> could give me
> an amount to use for a known tank size, I can scale it down
> from there.
> A few other questions I have are: what does it mean, "soluble
> potash (K2O)
> derived from sulfate of potash -------- 50%" ? And should I be
> about the warning (this product contains a chemical known to
> the State of
> California to cause cancer, birth defects or other
> reproductive harm)? Or
> is this warning more to cover their butts just in case? I
> can't seem to
> find MSDS's on specific brands of this compound.
> Thanks for any replies. My plants will hopefully be looking
> better after I
> start them on the potassium.
> - -Naomi
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