Be careful with the bloodworms. You meed to grind them up with a pestle and mortar and then soak them in water from your tank for at least ten minutes and then feed peas the following day (cooked, removed from the shell, and mashed) because bloodworms are constipating and peas will keep the fish from getting bloat. I wish someone would make bloodworm flakes. Also, I read that you should treat with aquarisol to prevent ich before feeding frozen brine shrimp, but I couldn't aquarisol so now my aquarium is on lockdown and has the blackout trash bag around it. Hope that and not feeding and and increased temp and Ick Attack will kill the ich and not the cories. Hope my mistakes help your platies. They are such personable fish.