I got a pH test kit. The distilled water seems to be around 6.4. I put a sample of soil in a coffee filter and poured some water through it and the pH dropped down to around 6.0 =/ so maybe it is a lockout problem. I'll properly test the runoff pH when I get up tomorrow.

Whatever the problem is, it's getting worse pretty fast. Today the leaf in the first picture is completely shriveled and dead, and the leaves in the second and third picture are much more discolored. I'm afraid the whole plant will be dead within a week if I don't figure out what's wrong. If the runoff pH is low I'll probably end up doing a flush.

My tap water's pH is about 7.5, so I mixed that with the distilled to get a gallon of 6.6 water if I do need to flush, is this a good pH to aim for? Also, if I do flush, should I give it a light feeding immediately after? Or wait a day or two?

Thanks again.