help fish start dying
 

HI
I check my water at the store they said everything is fine just a water change will be good i did 10% water change all coral closing and same to anemone but my 3 fish died right after 3 hours water change
salinity 1.024
PH 84
temp 78

here is the video after 3 hours water change
http://www.youtube.com/watch?v=wtkLVSzQuvk

Do a bigger water change.
Did you change or add something to your filter?

check your alk!

Agreed! Do a massive water change, as big as you can. Something is in your system that's causing your fish to die. Have you used any household cleaners near the tank lately?

its not just your fish everything in that tank is dying, corals are closed,fragplugs are bare and a clear nutrient problem happeneing.


honestly if you want some help your going to have to include equipment list, schedules, parameters(in full) and livestock....without its just a shot in the dark and my shot is no oxygen i see 3 powerheads none of which are breaking the surface....your green star polyp has no movement at all and all fish are hiding,its also something they dont test for at lfs. how long did you mix the salt for and how did you go about mixing it and adding it to your system??

plus if you dont keep your powerheads clean they lose alot of flow so they look like they are doing their job but if you put your hand in front of them theres not much;)

No i didnt

there is a pet store manger told me when i add tap water i should add kh into tap water all the time i bought a kh bottle from him

is it okay if i change 80% water ?

you need to check you alk (kh), your tap water is prob high in alk and if you added kh you are prob really high.
I would do 25% wc at a time so you don't cause too much shock.