Multiple diamond gobies?

[lucas-grimm]

I have a 240 gal display and my sandbed although pretty clean could use a little extra boost. I have a single diamond goby I’ve had for over a year and I was wondering if I could add 3 more? I know they tend to like to be in pairs, but as I’ve had this guy for a little while I’m not sure how well introducing more would go. I’d try to add 2 sleeper gobies too if that could be better.

 

[DrMMI]

If you have one already, it's going to be hard to add anymore as it's likely established itself in the tank. I have a 260g and tried adding a second diamond goby and it didn't go well.

 

[lucas-grimm]

If you have one already, it's going to be hard to add anymore as it's likely established itself in the tank. I have a 260g and tried adding a second diamond goby and it didn't go well.

Any chance that trying to form a group would go better? I added a yellow watchman about 6 months ago and had no issues although they do tend to stay apart

 

[DrMMI]

Any chance that trying to form a group would go better? I added a yellow watchman about 6 months ago and had no issues although they do tend to stay apart

Maybe you can try putting them into an acclimation box near the sand bed for a few days and see how the other one reacts to them? If he doesn't pay any attention to them, you're likely in the clear. If he keeps trying to go after them, then maybe remove him for a few days, change up the aquascape a little, and add them all in together.