Parrot Cichlid With Black Fungus?

[Spishkey]

hi all long time no see
i seem to be having a problem with one of my younger parrots. it seems to have developed a black sort of fungus on its mouth and under its belly? it wasnt there 2 days ago so has appeared very fast. there is a similar 'blackness' on the other parrots tail. my first thought was ammonia burns but my tests came back as 0.
ammonia 0, nitrite 0,nitrate 20-40, natural (homemade) filtration, 900L aquarium
tank inhabitants - 2 oscars, large pleco,2 young parrots, 5 juvi black belt cichlid, 2 jewel cichlid, 5 juvi krobia sp xingu, 5 red clawed crayfish
im busy trying to get a photo but the #28### moves too fast...will keep trying.
in the meantime any ideas what it could be? its going to be difficult treating the tank (due to pleco and crayfish)but if its a contagious illness i suppose im going to have to risk it?

 

[Spishkey]

Photos!

 

[Spishkey]

no ideas?

 

[minxfishy]

Hi spishkey, not really sure what to suggest, does it look more like spots, asking because my Severum had a similar problem, black spots appearing and they were found to be a parasite along the ich lines, a few days of higher temps and some ich meds cleared it up, although unlike ich, these parasites could sustain themselves in the substrate for months, however, since the medication, the problem hasnt returned.

Another questions, what colour is your substrate, if its black, could it be discolouration from rubbing on it?

 

[Spishkey]

hey minx
no its not spots,on the belly it looks more like 'dust' stuck in cobwebs? (only way to describe it, its nottotally stuck on the body there but seems to hover just off the skin) and round the mouth it looks like someones smudged coal around!
no substrate its light coloured.
the other parrot has the same blackness (no so much) on its tail fin around the top edge thats all. ive never seen anything like it? no other fish are effected

 

[minxfishy]

Ive had the cobwebby effect before, although in white on some corys, couldnt work out what it was and I lost them.

I would treat for fungus, myxazin, pimafix, maracyn or similar.

 

[star4]

Nice to see you hun . This is going to sound a bit stupid, but in the second picture it looks a little like a breeding tube decending, have the 2 that have this brown stuff been digging a pit or something using their mouth and belly? (I have no idea about parrot breeding behaviour) and its debris stuck in the slime coat? Jehtro my plec had something similar the other week, he totally uprooted a plastic plant and must have gone grubbing around in the muck underneath as it was all over his nose, I added melafix but when he came up for his dinner it just wiped off

 

[Spishkey]

well two days of treatment and its no better, maybe worse. fish is fine in itself just the gross looking blackness. any more ideas? its spreading on the other parrot now. its tail is speckled with black. it looks almost like markings but parrots dont have black speckles!