I get similar symptoms when I water "inconsistently"...

Karin

There are three leaves showing symptoms, and part of the area around the dead part appears 'water-soaked'.

This one does get watered consistently. I check it a minimum of every other day.

How does this look by now? I don't really have an idea if it's a fungus or not. You may need to email one of the pros. ;)

Sue

I removed all the bad leaves after taking that pic. A few days later, another leaf showed up that was even worse. I removed that one as well. Nothing yet on the other leaves. I think it starts on the bottom of the leaf and then shows through that top. But I could be wrong.

It is definitely something. But hopefully the plant can recover by itself, since I cant treat it right now. I have separated it from the other plants.

looks like overwatering or inconsistent watering. Another possibility is that a drop(s) has just sat on the particular leaf and caused the rot. If you know to water at the base rather that on top of plant, you can certainly eliminate this possibility. This is not fatal if you correct your watering routine. My indoor plants require much less watering in winter, including the water thirsty tropicals and even with heaters running. This would certainly apply to AVs.

I dont water on a schedule. I water when the soil dries. None of my other AVs have this problem.

Water changes such as chloramine from tap water? Chloramine won't affect all plants the same. You would have to share more about the care provided, otherwise, any response is going to be pure speculation.

Plant is grown in MG, and terracotta. Watered consistently with either distilled or spring water. Dilute african violet fertilizer added to 3/4 waterings, the 'every time you water' dilution. Grown in a north window under a grow light. Fan on in room 24/7. Periodically has trouble with powdery mildew. Humidity stays between 45% and 60%. Thermostat set at 68. Temperature variances due to both cold windowpane and electric heat register below the window (not forced air), which the fan circulates. NOT on windowsill. Plants on windowsill are unaffected and healthy.

This post was edited by Lauraeli on Thu, Jan 8, 15 at 1:30

Hi, Sounds like you are doing everything right. Perhaps with this information, one of the "experts" who might still be reading the forum will see this and be able to advise.
(Some of the experts who used to post regularly seem to have retired from the forum.)
I would not know what is causing this. It could be that
particular plant is on the wane. Sometimes, that happens, for no obvious reason. If it is a plant you like, you might
want to take a healthy leaf to restart it before the entire plant is gone.
Best of luck, Joanne