Well when they were small (1-2) inches I fed them a hole lot of brine shrimp untill they were 6-7"s then the got strait feeders with the occasonal brine shrimp feeding. the problem is they eat a hole lot of it, I was buying in quan. but they would eat 1lb at a time. I also keep my water temp a little higher like 80 to 82. this will make them eat more and any disease will run its path quicker.
my buddy had a 150gal.with 6 10"-12" reds. OMG his tank looked so nice. his p's also looked nice. i bought 3 of them. they were the largest reds i have ever seen.i had them in a 65 gal.
they all died. i wish i knew what i know now back then. i could have taken better care of them.
his p's where 5 years old when i bought them.he rased them from babys.