Tank info: 10 gallon, 20 watts CF lighting (11 hrs day, bulbs only a few months old), dose liquid P, N, K, Flourish, and Excel daily (easier for me - dose at recommended dosing, except I add a bit extra K). Inert substrate. Nitrates at 10-15 ppm. No inverts (puffer tank). Tank shot in my tanks in signature for plant info. Excel dosing began on 10/6 (this is the only change recently).
Here's the story...I first noticed a dying/browning plantlet down in the roots near the rhizome 2 days ago - I figured it wasn't getting enough light, and was small enough that I wouldn't concern myself with removal until next water change. Yesterday I noticed a brown leaf in with some of the newer leaves on the plant. Figured I just hadn't noticed before. I was running late and couldn't remove at that time. This afternoon - numerous leaves are brown/rotting - and it seems that wherever a browning leaf touched another leaf, that leaf also went brown at that spot. Some went brown from stem up - others went brown in the middle. I've got old and new leaves effected. It honestly looks similar to crypt melt. No other plants appear to be in distress - the only other issue was an aponogeton crispus leaf touching a browning java fern leaf that also rotted.
Pictures (the thin leaf in the 2nd picture is the aponogeton leaf):
I pulled the java fern driftwood from the tank and trimmed out all of the effected leaves. There was also some dead roots which pulled off easily that I didn't notice while it was in the tank, so no clue when those started dying.
Any ideas what is causing this? Deficiency of something?
I'm doing a 40% water change as soon as I'm done with this post.
Here's the story...I first noticed a dying/browning plantlet down in the roots near the rhizome 2 days ago - I figured it wasn't getting enough light, and was small enough that I wouldn't concern myself with removal until next water change. Yesterday I noticed a brown leaf in with some of the newer leaves on the plant. Figured I just hadn't noticed before. I was running late and couldn't remove at that time. This afternoon - numerous leaves are brown/rotting - and it seems that wherever a browning leaf touched another leaf, that leaf also went brown at that spot. Some went brown from stem up - others went brown in the middle. I've got old and new leaves effected. It honestly looks similar to crypt melt. No other plants appear to be in distress - the only other issue was an aponogeton crispus leaf touching a browning java fern leaf that also rotted.
Pictures (the thin leaf in the 2nd picture is the aponogeton leaf):


I pulled the java fern driftwood from the tank and trimmed out all of the effected leaves. There was also some dead roots which pulled off easily that I didn't notice while it was in the tank, so no clue when those started dying.
Any ideas what is causing this? Deficiency of something?
I'm doing a 40% water change as soon as I'm done with this post.