Help, fry dying! URGENT

[Meghanwarren]

I have 16 five week old molly fry in a 20 gallon tank with some other fish (I'm in the process of getting another tank). Last night I noticed that a couple of them had white spots on their fins. I have ick medication but I thought it would be too harsh for all the babies. So, I turned the heat up 2 degrees and changed 25% of the water. I also added some salt and and 2 tsp of Stress Coat + and about 2 tsp of Algae Fix. This morning, one is dead and all the others are at the bottom of the tank. Some are feeding but a few are swimming strangely and rolling over and over. They also look like the scales near their heads have gotten lighter in color. Did I over heat them? What should I do? I turned the heat back down this morning.

 

[butterfly_koi]

What do you keep the heat in the tank at. Don't be too sad if the fry don't all make it sometimes they just can't handle certain water conditions. Just try your best to keep the ones that are left healthy. Sorry that you lost some of you're fry though.