SlimFlem wrote:

Hi.

I am seeing some holes developing in some of my older Sword plant leaves and
have read this is due to K deficiency. Is this accurate? Can some of you
please share your experience of dosing with Potassium? Currently I have
SeaChem's Potassium Supplement and use it at not quite the recommended
dosage. What other factors could lead to a low K level?

While all the stem plants and riccia grow like crazy in my tank, the swords
develop holes in their leaves, mostly at the tips. Because I dose two forms of
K, I am pretty sure that's not it in my case. I solve it by placing Jobes
Palm/Fern root spikes under the swords. Nothing else in the tank gets root tabs,
just the swords.