scary words in the ingredients list of FMR food and their meanings:
magnesium oxide: used to supplement the diet w/ magnesium
zinc oxide: used to supplement the diet w/ zinc
iron sulphate: used to supplement the diet w/ iron
copper sulphate: used to supplement the diet with copper. poisonous (fatal IN LARGE AMOUNTS). "copper is an essential trace element and is a constituent of plants and of animal and human tissues" (
www.inchem.org). copper sulphate is regularly added to the basic diet of much of the livestock you eat (pigs, dairy cows, etc). yes, its fatal if you get too much, but then again so is oxygen.
calcium iodate: couldnt find much info on this except that it is a common additive in foods for all animals and people alike. perhaps it provides calcium?
cobalt: essential to many living organisms
calcium carbonate: calcium supplement. main component of seashells and the shells of snails.
meat and bone meal: "meat meal is an animal feedstuff produced by recycling animal by-products. these by-products include meat trimmings, inedible parts and organs, fetuses, and certain condemned carcasses. they are cooked (rendered) to produce a nutritional and economical feed ingredient. blood, hair, hoofs, horns, manure, stomach contents, and hide trimmings are not permitted to be added to the meal. when bones are added to the meat meal it becomes meat and bone meal" (
http://edis.ifas.ufl.edu/PS024). research in the 1980s found that many bone meal preparations were contaminated with lead and other toxic metals, and it is no longer recommended as a calcium source. view the previous listed website for extensive info on meat and bone meal
most of this info was found on wikipedia. correct me if i'm mistaken but i dont see which of these ingredients is used as a preservative? the one point i do agree with you all on is the use of meat and bone meal, it can be dangerous. but that is not enough to stop me from feeding my crabs FMR food.