BB gobies are small, but they'd add to the bioload and likely increase the need for more frequent water changes (any tankmates would)...I'm too lazy for that kind of stuff myself.
My Puffers: Puffers I have kept: T lineatus T miurus A modestus T biocellatus C valentini C coranata C papuan C lorteti DPs suvattii burrfish T niphobles
PP - out of curiousity, what do you feed the BB gobies? They're cute little things, so I've thought of adding a trio to my 20 long figure 8 tank, but I know little to nothing about them.
My Puffers: Puffers I have kept: T lineatus T miurus A modestus T biocellatus C valentini C coranata C papuan C lorteti DPs suvattii burrfish T niphobles