Strange. A fish dieing should not make water cloudy, any idea how long it was dead for before you got it out?
But from the fact that pouring the new water on your coral bleached it, I suspect your salt, or something terrible in the Edmonton water supply. So you need to use RODI water and new salt to put your animals in.
Have you re-tested Ph and Alk and tried any buffers yet?
Did you dechlorinate your water and leave it overnight with a heater and powerhead before use? Otherwise a 50% change will significantly reduce the oxygen and temperature of your water.
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