I really have no clue as to the cause of the infection, the water stats were and still are ammonia 0, nitrite 0, nitrates 20, ph is 7.8. No chance in my stats since the tank was cycled months ago. 30 - 40% w/c once a week, sometimes every 5 days depending on the waste build up on the sand! (Damn those plecs are messy!)
The only thing I can think of was that it came in on the corydoras that I introduced 2 1/2 weeks ago.
Although this evening they are swimming around more than this morning.
I may be able to find a vet, but to be honest no idea how much that will cost or how willing they would be to give anitbiotics, some phone calls monday morning will tell me the answer to that.
I am of the opinion that if things dont look up soon, that euthanizing the worst effected is probably the only way to go, trouble is do I just do the worst effected or all the affected to try and stop the spread.