I buy about 12 pounds of frozen food 2-3 times a year. I feed it as a mix, bloods, mysis, brine, brine gut loaded w/ spirulina and daphnia. For fry it is cyclops and rotifers and occasionally BBS (these are too expensive to use reglarly and I do not hatch them). I put the frozen food into a container and add warm tap water. I have a well and never need dechlor. I woiuld use tank water rather that adding to dechlor to fish food. For the fry I just pour the water with the food into tanks. For the main food I use a small strainer to take it out of the container and put it into the tank. This leaves most of the coloredwater behind. Bear in mind that cooking fish food destroys some of the nutritional value. Even warm water can do some reduction, so I try to avoid hotter water. If you can be patient, room temp. water will defrost frozen given some time.
My fish are pigs, they hit anything they think is food as soon as it hits the water. I prefer they not swallow frozen food, so I will only drop in a cube of blood worms (I am allergic and cannot buy it in slabs) into pleco breediing tanks. The do not surface or open water feed so the worms have to defrost to sink to where the fish are.
I do feed other foods besides frozen. Mostly Repshy and then for commercial I use an assortment of foods from kensfish.com. I am not a fan of most commercial foods and try to limit them to 20% or less of the diet. The problem is I can feed all 20 tanks with commercial in a lot less time. Feeding Repashy is a 30 minute process, frozen is about 15 and commercials takes about 5. For breeding fish and growing out offspring, food quality matter a great deal.
The nice thing about the Repashy is one can mix the different formulas together. I add about 20% veggie to the meaty foods. This means the fish that need some veggie matter as well as meat can get it all at once.