It can still be infected even if it doesn’t show it, it can take a while for some fish to even show it, but when brook hits, it’s bad. A cheap 10 gallon tank, a sponge filter, and some pvc is all you need. Mine is set up in a small corner, I barely notice it’s there. I’ve had all of these same questions before, the only surefire way to have success is doing all the undesirable stuff.@Sharkbait19 thank you, now it’s clear !
Can the blenny be infected and not show signs ? I’m just trying to see if there is a way I can avoid having to set up a third tank just for the blenny.
As for captive breeding concerns, it reduces the chances of many parasites like worms, but stuff like ich, velvet, and brook are all still prevalent. I’ve gotten them on my captive and wild fish. It’s more of the tank they were in before hand than where it was collected. You can buy pre quarantined fish from some online vendors, but those fish are typically much more expensive.