Maggie to tell you the truth I dont know all my expertise is in koi you'd need a heavy duty goldfish book for that I believe I passed you the name of such a book while back that goes into goldfish genetic's diseases Pathogens etc did yu buy it ?,Gee, @Dave 54 , and just about the time I thought I was getting a handle on these fishy diseases...... Does it also affect goldfish?
If not it might be an idea that you do because my only book on goldfish doesnt cover that even if it is Dr Eric E Johnson Author it doesnt seem to cover it sorry .
Dave