Evil Affliction(s) must be remedied

[myfs_123632]

All 9 of our fish died overnight! The aquarium and 9 fish were bought only 2-3 months ago as a feng shui enhancement the fish and tank were well cared for, there has been no reason or indicators of any natural or environmental factors that would reasonably explain the deaths.(Nfish all sank to bottom of tank instead of floating)

If the fish deaths indicate an affliction that would've otherwise befallen resident(s) but the affliction killed ALL the fish in matter of hours...

what are the proper steps to replace the fish/tank?

how can I be sure the affliction was averted and not merely exhausted since all the fishdied .

is there any way to find out what theaffliction was/is or whom it was to befall?

Thankyou for any knowledge you may be able to share,

Red Budderflie