There is a downside to spacing out like that also and that is territorial agression and size differences. I have a hard time finding fish that are big enough to hold their own against the established fish in tankThere is certainly more than one way to skin this cat, but I would space my fish out a lot more than that - probably no more than a fish per quarter.
I might even wait months between fish to become accustomed to the new guy.
It also takes time to find fish that I can be beyond-a-shadow-of-a-doubt-sure are worth the hassle and risk of bringing home. It is possible to get lucky quicker, but it would take me typically weeks to zero in on an individual to bring home.



