:shock: wow some interesting pictures
ok well I think the first fish (goldfish) has a wound, most likely caused by another (larger) fish or perhaps it could be an area that was effected by slime disease and the skin has peeled away where the slime had been.
I agree with the velvet & ick pics, but I believe the "dropsey" one is better for showing scoliosis (sp)
oh and yes velvet is VERY curable
I'm not too sure those cardinal tetras are even ill, althoug neon tetra disease gives the symptem of a white belly, cardinals have a white belly like that anyway - as do neons.
I dont think they are ill.
the pic of fungus also shows the stressed look of clamped fins - a sure sign of disease or a bully fish
The oscar with HITH, well its not too bad condition for HITH and it is fully cureable at that stage, you might get left with a little scarring, but that even might heal, CLEAN THE TANKS!!! in fact to cure them you will have to do small daily water changes, offer a GOOD QUALITY and VARIED diet and remove all carbon, oh and raising the temp to about 84F should help too.
great pic of the pleco with a touch of ick, to cure that I would suggest not using meds, but raising the temp a little bit (84F) and adding some aquarium salt (1 tablespoon per 5 gallons) should do the trick, in my experiance meds are more harm to your tank than good.