Elaine, that looks like Bacterial Soft Rot ( Erwinia chrysanthemi). High temps and lots of moisture is where it thrives. If it reaches the crown, it will girdle and kill the plant. Splashing water or infected tools will move it from spot to spot. I would get rid of that leaf and use systemic fungicides. By all means, isolate the plant.
Bree, I'll try to get another picture.
Ursula, I love the Epi 'Hawai'. The Neos and the Darwinara are nice as well. You've made a nice recovery.
Jim
