240G deaths already

The configuration sounds good to me, then. We can get O2 deprivation out of the picture... did all the fish come from the same store? Maybe they were already sick?

Did you notice anything weird on their skin? Little white dots are usually a pretty good sign of ich. If so, feed them well and make sure your water quality is good. Also, were the tanks brand new, or pre-owned?

 

No white spots on either fish. No signs of stress when placed in the 240G. They ate flakes during the first three days of their arrival. I didn't check with the lfs if it ate right there on the spot, but it certainly ate at home.Yes, SG was high due to evaporation, will be working on autotop off.

 

No white spots, the 240 was new.

 

I'd say that it was due to stress or maybe the tank went through a small cycle after adding the fish... had an ammonia/nitrite spike that went away by the time you tested it.

IME, new tanks, regardless of the size need more time than the typical cycle to balance out. I'd say 6 months before fully stocking, if not longer.

 

I had a nice scopas tang that was healthy in a buddies tank for 8 months die after 3 day in my tank for no reason. He was eating, active, and followed you are the tang, there were no marks from something "gettin 'im" and thats just the way it seems with tangs. I would wait a while before trying them again just to let things 'age.' Right now im on day 6 of my yellow eye kole tang and even those he is really shy and i hardly see him he will make it, i thin mostly because my tank is a couple months older.

 

Interesting, thanks fellas for the quick replies. Very responsive forum!

I'll tell him hold off in the meantime

 

Actually, the salinity is a big issue. Do you know what the salinity at the fish store was. Mine has tested at 1.020 at times. That was be a big jump and capable of causing at lot of stress.

Being slowly acclimated up to wouldn't be a problem. I've accidently found my tanks at that recently *blush*. But it got that way over time and the fish weren't stressed in the least.

 

Reading through this I was thinking the same thing. Fish stores are notorious for running low salinity in their tanks. If that was the case, and your salinity was high, it definitely could have killed new fish without harming the existing ones. I would help to test the stores water when you get home. With the last two coral purchases I make, the dKh was at 6.

Also, I'd consider a quarantine tank before you get too many fish in the tanks that you would regret losing.

 

interesting. If the salinity was an issue, wouldn't they have showed signs first day? what's the cause of the powderblue breathing heavily?

 

Possibly. It's all guess work at this point, based on the information that you provided. There could be other factors that you haven't noticed or thought of. Many times it's more than one problem. Salinity may just be one. Just be glad it wasn't something like velvet. Without a QT, all of your fish would most likely be dead. It may sound harsh, but it's better to change your procedures now rather than lose more fish later.