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Re: More K+
>Sorry for all these repetitive postings, but, I got to my office this
>morning and looked up the mean chemical contents of world river
>water. Not 10s or 100s of ppm, but 2.3 ppm. So a 3 ppm/day addition
>of K via KNO3 is significant if one is interested in keeping
Hardness is determined by the amount of Ca and Mg dissolved, not K.
You really shouldn't be concerned about adding too much K--most fresh
water fish typically maintain an internal concentration of about
100-120 ppm K in their blood plasma. Freshwater organisms are
concerned with K retention, not excess K excretion.
If you are adding 3 ppm/day of K to your 10 gallon aquarium, then you
are also adding 4.6 ppm NO3/day. Why are you adding so much? You add
as much as I do to my 90 gallon aquarium. Is your test kit accurate?