Stubborn Spotfin Lionfish

[JaiWiz]

I live in Red Deer, Alberta. So live saltwater feeder fish are very hard to come by unless i jus buy green chromis which in that case the lion will be very pricey to feed. freshwater feeder fish are readily available but i have heard they have toxins in them which can bugger up a lions insides.
my next question is what should i feed him regularly ? I have read you need a variety to keep them healthy if you want your lion to have a long life. Are pacific white prawns alright or should i purchase some mysis shrimp and frozen krill ?
i really love this fish lol more then i thought i would i became attached within hours of having it ha.