Help! Fish lying at bottom breathing heavy

What salt are you using to do the WC? I've read some threads about a *possible* bad batch of Reef Crystals from a few months ago.
 
Well you could have mentioned the petco part! I think all hobbyists should boycott petco. Leave your tank sit fishless for three months then buy fish from a reputal source and always quarantine.
 
Everything is a learning experience. One thing that might be advisable, nothing to do with the dead fish, is to set your temperature a little higher between 79 and 80. Ironically, about 8 years ago, I had a suicidal clown in a pair that I had and in a moment of weakness I liberated a Petco clown. I didn't QT at the time and acquired marine ick as as a result. I did copper treatment in a quickly bought QT and they survive until today. I did learn at the time that the higher temperatures (and QT) ward of the ickies.
 
I'm late in the game here, but just out of curiosity, is that koralia you mentioned still running? Do you have a grounding probe on your tank?

I have lost fish to stray current in the past before I had a grounding probe. I've got one in my sump and one in my main tank now. Might be worth installing in the future, my victim was a pricey semilarvatus butterfly fish. Learned my lesson the hard way, as many of us do.
 
I have it plugged into an extension cord that goes to a grounded surge protector. I didn't have the pump plugged in all night or morning. I had unplugged it before bed when they were both fine. They are both dead now :(
Seemed like whatever it was the damage was done. The blue one was hanging on when I went to bed but was dead when I woke up.
 
On a side note... Is there any way to slow down the Koralia Evolution 1050 I have? I probably should have gone with the 750. I think I've read you can replace the impeller with a smaller one meant for the smaller pumps? It just seems too strong of a current in the tank. Have it on the side pointed up towards the center giving good ripple but still creates a lot of current across the entire tank coming back towards it.
 
If you have the tank on a GFCI outlet a grounding probe shouldn't be necessary.

A quick way to find out if current was the issue would be to take a volt meter and check the water for current. I am far from an electrician, so if my terminology is incorrect on voltmeter, I apologize in advance.

It's been a while since i've done this, but I think all that is required is to put the black end in a grounded socket, and the red end in the tank. If there is any level of current, your needle should ping. You need to be sure that the socket being used is truly grounded and not just a three prong socket. My house is older and most outlets are not grounded, but have the new three prong style for convenience.

I don't trust GFCI outlets, I know in theory they should work, but grounding probes are cheap and easy to install and I look at them as a second level of protection. My two pennies.
 
It might be a good idea to take your water into an LFS for testing...there are also online full spectrum testing at places like the following:
http://www.aquariumwatertesting.com/

I am not specifically recommending the one above, but something like it that can do many tests. The cost a bit, but might keep you have having to blow away your whole setup and starting again.
 
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