I'm wondering what's causing some of my plants' leaves to curl. I have naturally soft water and sand. My amazon Swords love the conditions and grow very majestically. However, SOME of my anubias and crypts seem to have problems.
SOME Anubias: older leaves curl
SOME Crypts (Green): new growth looks healthy, as the leaves age they seem to melt
SOME Crypts (Red): new growth looks healthy, as they age leaves curl severely to the point where they look like sticks, although the leaves are still completely intact
These symptoms appeared over quite some time. I do NOT fertilize, because SeaChem Flourish seems to burn leaves of anubias, causing yellowing at first, then the leaves die. Also, up until recently, I didn't SEEM to need ferts. Some plants are over two years old, some are propogates from existing plants. I also have corkscrew vals that do well, as does my Rotala. This is consistent across several tanks, as well.
Lights are compact flourescents, temps in the low 80's, no CO2, no fish meds recently, no changes to water chemical make-up.
Some web sites attribute this to possible Potassium deficiency, some refer to magnesium deficiency, so I'm not sure. Since Flourish contains both these minerals, should I chance the Flourish again at 1/2 dosage? I'd hate to kill off my anubias! :-(
Any ideas or coments would be greatly appreciated, as would feedback from those of you who might've previously experienced this same phenomenom.