1 month old discus fry swimming weird. Anger, upset, and disappointed

[J.M Discus]

I have 18 fry, about 1 month old. Today i woke up and found on dead, after that i notice there were about 5 discus that were at the top corners of the tanks and 1 dashing about the tank. I have quarantined all 6 of them. I figured they may be bloated so i added aquarium half and epsom. i have seen no improvement. My water parameters are GH 0 KH 0 pH 6.5 No2 0 No3 0

[nc0gnet0]

What is your water change routine and why are you using what appears to be pure RO water?

[J.M Discus]

Well it turns out only 2 died, the cause.... bloated. I figured that my frozen food i use to feed them wasn't refrigerated well. Thanks anyway for the help!!