I noticed something with my Cryptocoryne longicauda the other day. Older leaves will turn yellowish with dark green
veins and the tips of the leaf will start withering. To me, that indicates a nutrient deficiency. Hard to fathom since
I do fertilize my plants. Overall, the C. longicauda is growing well – though I’ve got shorter petioles than
most pictures Ive seen of it.
Here’s the longicauda that’s showing problems.

