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In my 30 gallon i have 1 dragon goby 2 bumble bee gobies, 1 knight goby and that's pretty much it. Anything else i can put in it? What about a green scat?
I would guess that you are full as it is. Dragon gobys get fairly large, I think around 18 to 20" . Green scats can get up to 12" so you would definately be overstocked with the scat.