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On 11/25/2002 10:24:16 PM
Dupla laterite does not have K as far as I know. The laterite has a high CEC and that's about it, I am not sure the Fe in laterite is available to the plants.
My K was being added through PMDD K2SO4 ingredient only until recently.
Jobes sticks did help but this KNO3 into the water appears better.
My oldest tank is about 2 years and it was kind of dying on me ( my other tanks were torn down before this due redecoration etc., at home ). Other than undergravel heating coils is there some other way to prolong the tank ?.
I don't know how many of you have tanks running for long periods, so any input you can gather on extending the life of the substrate will help or else may have to tear down and redo the whole thing again - expensive.
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