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Discussion Starter · #1 · (Edited)
Would there be someone out there that would agree with me that the K levels in API Leaf Zone are quite high?
My assumption for this came about when I was dosing daily doses without water changing for more than 3 weeks...
I have read on some forums that high K levels will reduce the uptake of Ca..... I have noticed a Ca deficiency - but the Ca test shows sufficient Ca, and I add extra Ca without any noticeable change. After a water change, without adding any extra ferts, all goes well again. This problem was worse when I was adding KNO3 on top of that... I have since started using NH4NO3 with better results, but I still have to water change the tank every 2 weeks to prevent the K levels from going up....

Any comment on this??
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