OK from the PM you sent me your ammo is at 8, That is not good. First I would like to know the PH of the tank and the PH from your tap. If they are within 1-1.5 degree then do the following. Do a 25% water change now. In 2-3 hours do a 5% water change then in 2-3 more do a 10% water change. Go back and forth between 5 and 10 % every few hours until it straightens out. You may want to move the betta to the 2.5 and maybe the cories to the 29. I don't know how they will fair with the aggression from a butterfly. Should be okay for a few weeks but I don't know...ask inchworm. Okay so move the betta and maybe the cories and do a 25-30% water change. Then do a 5 then a ten then a five then a ten until your levels get lower. like ammo 1. After you change about 45-50% of the water go to sleep then get up and change another 15% then 10 then 5 the alternate again until levels go down. Good luck and wait for confirmation from another member if you can.