I know you probley seem very inocent.
But, i think you have killed your fish.
I'd take them back if i was you.
Never tamper with wildlife, it's never very rewarding unless you know exactly what your doing.
There are lots of minerals & many things in our tap water that fish can't servive in.
You have to buy stuff to put in the tank from the Pet Store.
Sorry, & i hope they are alright.
Take them carefully back to where you got them & hope they get better.
They are too big for the cage anways..
Hope this helped.
Thank you.
