Phal Leaf problem?

[mattryan]

I am in need of some advice. I have had this phal for over a month and all seemed fine, but in the last week something bad is happenin to the leaves. They are turning a lime grn with spots. Is this some sort of bacterial infection? I tried cutting some out of 1 leaf, but it looks like it is spreading down the leaf anyway. The only leaves not affected are the 2 uppermost leaves. I will unpot and check the roots and cut the spike off. I have never seen this before, all that I have done is replace the old bark with new since I've had it. Other than that is there anything else I can do to stop whatever this is from spreading to all the leaves? Thanks for the help