Please help! Beloved BGK with a bum pectoral.

[scottskindaweird]

My Ghost Knife, The Archbishop Desmond Tutu, has something wrong with one of his pectorals. He doesn't seem to be able to move it and it's got a little of that rotten look on the leading edge. Other than that he's the happiest and friendliest BGK ever. Still highly active and the fin doesn't seem to slow him down, but my girlfriend and I really love the Archbishop and I don't want anything to happen to him.
I started feeding him earthworms about every other day a couple weeks ago, he loves them. I get them from a bait shop, squeeze the poop out of them and cut them into bite-sized pieces and he comes straight to my hand. Diet change?
My Rubber-lipped pleco, Helen Thomas, died a couple days ago. Related?

Nitrite - 0
Ammonia - 0
PH - 6.6 (having a little trouble regulating it)
KH - 15-20
GH - around 125

Help me save The Archbishop!

 

[scottskindaweird]

I have him in a planted tank with driftwood that he loves (recently got a little black algae on it) and a ghost tube made of an old glass jar.
4 opaline gouramis and 2 sunset gouramis, 9 each neon tetras and harlequin rasboras, 1 SAE and a peacock eel who never comes out of hiding.

 

[scottskindaweird]

35 gal tank, fed on tetracolor flakes. Tank is about three months old. Was overfeeding, but stopped a month ago.

 

[aclockworkorange]

I've heard you're not supposed to use earthworms from a bait shop because they use something or other that's not good for fish to keep the worms fresh.
Someone should be able to verify that though.
Can you post a picture?

 

[scottskindaweird]

I've heard you're not supposed to use earthworms from a bait shop because they use something or other that's not good for fish to keep the worms fresh.
Someone should be able to verify that though.
Can you post a picture?

Well those are right out then, any idea where I can buy good ones? pic coming...

 

[scottskindaweird]