Feed them well for a couple weeks. Then "starve" them for three days and then they should eat pellets. Just make sure you're feeding them healthy feeder fish.
Way cool, seems like you are on your way to looking after perch(which in my mind looks the best, cause of the stripes) hows whitie doing? your bottle design has given me and properly several others a new consept to tank designing, i also have a channel cat and this one likes to get alittle rough with my bass but they never hurt each other.Have you seen any improvements with the ICK?