Fish Death continues.... Any solutions....

[moppy]

Thanks for all the inputs so far but here is some more info:

Water Parameters:
temperature 80 degrees ish...
Salinity 1.022 - 1.024
Nitrates 0 - 2.5 ppm
Phosphates 0 ppm
Alkalinity 70 (kit I use to measure says it should be around 100)
Calcium 450 (kit I use to measure says it should be around 450)

Fish (and other things) that have died:
Copperband - nothing noticably wrong had for 5 months
Flame Hawk - jumped after 1 day
Red Scooter - didn't look skinning or anything had for 3 months
Potter's Angel - nothing wrong had for 2 months
Lawnmower Bleeny - nothing noticably wrong had for 1 month
Madarin Goby - nothing wrong had for a year and a half
Sohal Tang - didn't really eat too much had for 2 months
Bar Goby, Flasher Wrasse and Firefish- jumped after a number of months
Cleaner Shrimp - nothing wrong had for 2 years

This tank has been going for about 5 months but I moved everything from another tank that had been running for a year and a half. I used mostly the water from the first tanks but new sand (with some dosing from the old). Didn't get most of the new fish for about 2 months after the new tank was running.

Hope that enough info... I know they're not all perfect but again, if the corals are doing well shouldn't the fish be fine since they're hardier????

thanks everyone...