Most frozen foods use perservatives to keep the food viable while being frozen. On natural made food (blender type mush) the seafood that we buy from the store has already been sprayed with a phosphate based product to enhance color and retain moisture. When rincing your frozen food it is best to rince it in ro/di water (striped down) this allows for more of the P to be drawn out, then toss the rince water out and feed the balance.
I am sure that a small ammount of good is lost in the process, but the removal of so much nutrients for me anyway is definately worth it. As per its value as a food source for corals I would imagine it might be, but when one conciders that virtually all corals eat detritus and waste (which we all seem to have to much of already) I dont see the need to add another food source to an already nutrient laidened enviroment.
Just some thoughts
Mike
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