Hifin goby

[Redbird5]

I've had two of them. They are really cool fish, but I'm having no luck keeping them. I'm unsure as to why. They last about a month in my aquarium
One died when my nitrates were 0 and my lfs and concluded that I was feeding the bacteria enough. He was very small, maybe an inch.

My current hfg has been MIA since Thursday. He was full grown and eating fine and one day just vanished. I'm not going to look for him yet. I read that they might sneak into the filtration system. I haven't checked it yet. I know hunting for him could stress him out.

I'm looking for advice on what these guys need. I have nice rocks for them to hide under. I feed them brine and mysis shrimp. No shrimp buddy yet, but that’s no mandatory.

I have a solid lid on my aquarium. I keep closed. I talk to them. All my fish get to watch baseball. I've never shown them finding Nemo.

 

[Rocks reef]

Fish don't really care about nutrients in the water like corals do, I'm not sure why your LFS stated that. Hi Fin Gobies are a carnivorous fish, so feeding them meaty foods will be fine.
If you haven't seen your other, I'd try to find it. If it has perished, you don't want that rotting in your tank.

 

[kfries]

I would check your sump. I have had them in there before. I had one paired with a pistol shrimp. The goby was lost and the pistol shrimp was in the tank for three years and I never knew about it till the tank got tore down and livestock sent back to LFS.

 

[Redbird5]

I would check your sump. I have had them in there before. I had one paired with a pistol shrimp. The goby was lost and the pistol shrimp was in the tank for three years and I never knew about it till the tank got tore down and livestock sent back to LFS.

I checked my filter at lunch. Nothing there, but I might have to go through the rocks and see if he's there.