How succeptible are they to disease, and what diseases are common in them? I'm wanting to order a midas blenny online and want to know how long to QT it for. Currently my 20g long QT is in use and I have another 10g & 5g that I could use. Along with my order I want 2 ocellaris and would put them in the 10g QT and was wondering if midas only required a short QT so that he could go into the 5g QT for a short time. Purchase size of the blenny will be about 1-2". Thanks.