losing fish rapidly... HELP

I added a Kole Tang Yesterday, a couple pieces of coral and a new power head around six o'clock. When I woke up this morning my angel fish was dead, caught under a rock. Went to work and came home, one of my clown along with the Kole are in the sand. I've touched both fish with my hands and/or pen and I really really don't wanna lose another one.

No visible white spots on either of the fish but definitely not swimming around like they should, what can I do?!?

 

water params??? including temp

 

what is your tank size? what other fish you have? what are your parameters?

 

Temp is 77, I've slacked on the param's cause Nitrites, Ammonia, and PH are usually pretty good, Nitrates have been between 20-40 PPM for a while. Did the Nitrates on Thursday. The other ones not for about a month

 

well you need to test the others...for the most part nitrates arent gonna harm fish..its the ammonia and nitrites that are prolly doing the damage to them..or maybe a stray voltage going through the tank...also oxygen depletion is another thing to think about..do you have a sump..or way the water is getting oxygen..

how long has your tank been set up??

 

Definitely check your other params, especially ammonia.

 

Tanks been up since September, livestock went in October

 

check ammonia, ph, and nitrites..

 

Ammonia is at zero, nitrite is at zero, waitin' on pH....

Is it possible I'm over reacting b/c I'm super mad my angel fish died after six months?

 

pH 8.2-8.4