Diamond Goby convulsing.... help

[frazin]

HI, I am new to this board and I would appreciate if anyone has any feedback. All my measurements are good.

Ammonia = 0
Nitrites= 0
PH = 8.2
Nitrates = 15 ppm
Temp= 80
Salinity = 1.023

I put the fish in last Saturday. He was a little skiddish and build his little house under one of my huge fossilized rocks. I can't see inside his little place but I know he was poping his head out once and awhile as I would watch him very closely. No today at lunch I finally see him out and I was all excited... but after I approached the tank... I was shocked.. he was upside down... just like the picture that I put up.... if you look at the picture he has some red patches near his tail but all of his color is still there... he will grasp a big gulp of water and then convulse like a snake bashing into the rock. I have no idea what happened.... anyone have any idea? This guy was sifting so much sand at the store that I thought he was the healthiest.... He has his full color so obviously he isn't too stressed... but then again... Hi tankmates are :1 yellow tang, 1 damsel, one porcupine puffer, 1 Fermosa Wrasse and a few snails. He doesn't have any sores or wounds but the red patch looks like his veines....

Thx

 

[reefrunner69]

How deep is the sand? It's possible he simply developed a bacterial infection, or if the bed is deep enough, he could have run into some hyrogen sulfide while sifting.

 

[frazin]

The DSB is fairly new it's only 2 weeks old, it's 3 inch deep, his hole is only about an inch or so deep if that.

I removed him and put him int a quarantine tank but he hasn't moved in awhile so my assumptions are that he is dead.

TIA