Or one can read the ingredient list of foods before buying. The best foods contain a lot of good stuff. Here is the ingredient list for the Repashy Community Plus which is " Our Meal Replacement Gel for Omnivorous Species of Freshwater Fish and Aquatic Invertebrates."
INGREDIENTS: Krill Meal, Alfalfa Leaf Meal, Squid Meal, Pea Protein Isolate, Fish Meal, Stabilized Rice Bran, Dried Seaweed Meal, Dried Brewer’s Yeast, Coconut Meal, Algae Meal, Lecithin, Locust Bean Gum, Citric Acid, Taurine, Stinging Nettle, Garlic, Dried Kelp, Dried Watermelon, RoseHips, Hibiscus Flower, Marigold Flower, Paprika, Turmeric, Salt, Calcium Propionate and Potassium Sorbate (as preservatives), Magnesium Amino Acid Chelate, Zinc Methionine Hydroxy Analogue Chelate, Manganese Methionine Hydroxy Analogue Chelate, Copper Methionine Hydroxy Analogue Chelate. Vitamins: (Vitamin A Supplement, Vitamin D Supplement, Calcium L-Ascorbyl-2-Monophosphate, Vitamin E Supplement, Niacin, Beta Carotene, d-Calcium Pantothenate, Riboflavin, Pyridoxine Hydrochloride, Thiamine Mononitrate, Folic Acid, Biotin, Vitamin B-12 Supplement, Menadione Sodium Bisulfite Complex).
And here is the nutrion information for Kikari Frozen Brine:
Brine shrimp, water, vitamin B12 supplement, pyridoxine hydrochloride, L-ascorbyl-2-polyphosphate (stabilized vitamin C), carotene, riboflavin, thiamine mononitrate, biotin, choline chloride, folic acid, calcium pantothenate, inositol, niacin.*
So my first question about Fis V is why would one choose to feed foods which did not already contain what the V is supposed to supply? Moreover, if one has multiple tanks and a variety of fish, we mostly buy our frozen in anything from 1 pound to 1 kilo slabs. These are way more economical. I do have to use Blood worms in cubes is I am one of the folks very allergic to them. Between wearing latex gloves and minimizing any contact with the food as I dispense it, I am able to use it. But I have to be careful. If a food is available in slabs, that is how I get it, The exceptions are the bloods but frozen daphnia and BBS. I only use a small amount of the latter two foods though. My fry and small fish mix is normally frozen cyclops and rotifers.
Next, if you have ever had to make medicated food you learn that once that food hits the water the fish must eat if soon after or else the medication simple goes into the water as it doesn't remain in the food all that well. For that reason it is often suggested that one keep fish hungry and only feed the medicated food during the treatment period. So I wonder if one does use the Fish X, how much of it actually ends up inside a fish.