Originally Posted by fishieness
that would be your problem right there!
all you are doing is getting your fish used to the temperature, not the chemistry of the water. Everything is different in your tank than in the fish stores. the amonia, the nitrates, the nitrites, the salinity, the pH!!
use the drip acclimation method.
Put the fish in a bucket, or if the LFS gives you small bags you can jsut use the bag and use something to stand it up strait.
1. buy a piece of airline tubing. A very thin piece
2. tie a not in the piece of tubing at the end, and stick that end in the bag or bucket with your new fish
3. siphone the water from your main tank into the bucket
4. adjust the knot so 5-6 dripps fall out a second
5. let sit for 2 hours, longer depending on the fish or invert. or until the water volume has quadrupled
6. let bag sit for a few minutes
7. add fish into tank without getting the water from the bag into the tank! (dont want your nasty LFS water in there, could be full of pathogens)
8. leave lights off for 24 hours
I am sorry but I never do the drip acclimate, although I do my acclimation over an hours time.......at least...15 min for temp to be the same then I start adding a few bits of water over an hours period, I have never lost a fish yet. EVER....