AFAIK API only provide a weekly dose amount which is 5ml per 40L, which adds 3.75ppm of K per litre. This is quite a lot higher than many other ferts but isn't particularly high given the Fertilator's recommended level of 10-20ppm.
API Leaf Zone and K levels
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??
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??
1 - 4 of 4 Posts
but if the plants are not utilizing it all, it will accumulate, and without water changes, the K will increase... what would be your opinion as to how much is too much??
I have started using another brand of liquid fert for my Fe and Trace... I will post up my findings in a few weeks....
I have started using another brand of liquid fert for my Fe and Trace... I will post up my findings in a few weeks....
Well you don't say how much Leaf Zone you're dosing but I'd hazard a guess that K isn't the problem - I'd say it's more likely that you're depleting another element and the water changes are adding it back in. If you look at PMDD recipes the amounts of K are quite high. If you're plants aren't using much then they won't be using much of anything else either.
Look forward to seeing the results of your new trace.
Jerry
Look forward to seeing the results of your new trace.
Jerry
1 - 4 of 4 Posts
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