Help ID Angelfish disease

Hi,

I have 3 approximately 6 month old angelfish of which one has developed
small holes in its fins right at the base where they join with the
body. The two holes on the bottom fin showed up 3 days ago 4/25, the
one on the top sometime in the last 9 hours while I was working. The
large splotch in the middle I'm not sure if it's related or not but
it's growing larger.

The fish is languid without much appetite but still eats a little
thankfully.

I have a picture at
http://www.archeus.org/images/hurtfish.jpg

My tank is a 45 gallon tall, canister filter with activated carbon
(Ehiem).
Ph 6.8
Ammonia 0ppm
Nitrite 0ppm

I change about 5% of water twice a week, I changed about 15% of water
last night as I moved water to a 10 gallon tank to prep it to put the
injured fish in soon as the other angelfish are starting to pick at it.

I feed them mainly flake food by tetra, but supplement it with some red
wriggler worms I grow in a worm farm that's fed non-meat table scraps.
Each angelfish has been eating about 2 worms per week, 1 per session
and pretty small worms at that what they can eat in one bite.

Also I put in a romaine lettuce leaf about 3 times a week which they
eat up in a few hours.

The only other occupants of this tank are 4 young 1 inch pictus
catfish.

Maybe related but don't know, right now I have serious green tank
syndrome but haven't taken any chemical steps (just scrub tank glass
with cloth to clean) to attempt to correct it because I noticed this
disease.

I'd appreciate it if anybody has an idea on what disease is afflicting
that angelfish and steps to correct it.