Yeah mine luckily never had cysts but they did go thru a few bouts of ick over the course of a few years. Current group so far has been staying pretty healthy, occasionally I'll lose a female due to cloacal prolapse but other then that haven't had to deal with any illness.Ah I see, I do get this too, spinal deformities pop up very fast in livebearers within like 2 generations, however the TB physique is very distinct, with the fish starting out normal shaped before slimming out and taking on that hunched back and slightly bent down shape. This is also usually joined by cysts and other things.