ahhhh good question, ive answered that before in other threads ive made, but ill answer it in this one also

i feed 6 pounds of shrimp and 6 pounds of hotdogs every other day and then i feed the growouts everyday, and on the days that i dont feed the big fish , i throw in pellets to various tanks, so lets add this up, 6 lbs of shrimp = 30 x 15 days a month is 450 a month in shrimp actaully a little less cuz i miss a feeding every once in a while, and the hot dogs i get from marks for 75 cents a pack x 6 packs = 4.50 x 15 days a month is 67.00 a month and i buy a 50lb bag of pellets for 30.00 every 4 months or so, a total of about thats like about 527 a month in food for the fish, if i feed on schedule, but like i said i miss at least 3-4 days a month, so it is about 500 a month for food, it sounds like a lot when i add it up, so i usually dont
bigrich