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It's a 3 x 18 x 18 the tiger is alredy there. It's established. About 50kg of live rock, plenty of corals,a pair of premna's, a hexatania, 2 chromis and 4 sand gobies. Not a matter of water condition just a matter of whether they'll get along...
So this is a 50g tank. With a lot of fish in it already. I wouldn't suggest adding any of the blennies you mentioned. The scooter will need much more rockwork and a good established tank with lots of copepods. I think I would stick with what you have, JMO.
Thanks, i didn't think they would. The 2 chromis would go if i did add the blennies though. Yeah my sand gobies get along good. I've got one male and 3 females so he's constantly busy dancing for them. Again thanks.