one by one :(

[Cujo#31]

Originally Posted by lemon604

get a cleaner shrimp or cleaner wrass. They will eat the ick off your fish.

Cleaner shrimp and wrasse cant "eat" the ich off fish IMHO. once ich has chosen a fish as host, it is not visible. The parasite is microscopic. What you see on the fish is a cyst the fish's body forms to isolate parasite from body. Once parasite matures it drops to substrate and the cycle begins.
They do however do a great job eliminating many other types of stray parasite that happens to enter water column.

[johnnyriker22]

That sucks that relatives put bleach in your tank. That's pretty stupid. I'm glad some of your inhabitants made it through. Have you de-chlorinated afterwards with prime or water conditioner?

You must have some major stress in your tank for this overnight death to be occurring. Try to stabilize everything in the tank like temperature and alkalinity. Don't let temperature fluctuate more than 2-3 degrees a day. See what your nitrates are like in the tank. Check out how to use active carbon properly. I use a cup every 2-4 weeks for 90 gallons of volume for example but every tank is different.

johnny