Oooh! A primer series on Fish Tycoon! Nifty!

I never got really hung up on the precise timing, but on fast speed it takes about 2 hours for fish to grow up. I've also seen some variance, perhaps to keep us on our toes, perhaps to account for different fishie species and "moods" of the fish, or perhaps that's just how it works.

It wouldn't be very fair if game speed didn't affect research speed, now would it?!?

With the medicines, I completely ignore the instructions and blast the tank with the appropriate medicine until any and all sick fishies in the tank are cured. Sometimes it has taken two bottles of the stuff to cure a stubborn fishie, and who wants to wait HOURS for that!?