Hydrating fish food pellets. I found there were numerous discussions about using hydrated pellets but few if any specific instructions how to do it. Here is the hydrated fish pellet recipe that I developed and have been using since 1990. I developed this method to pellet train fish in cages. Flavored water can even be used to enhance the flavor of the pellets for training fish to eat pellets.
Softening Fish food Pellets
One quart of pellets (1/4 cup 5D06 Aquamax 1/4")) and 6 to 6.5 ounces of water. For one gallon of pellets use 24 - 30 ounces of water. Small batches: first try one cup of pellets & 2-3 tablespoons of water. Pellets will soften quicker when warm water is used. Smaller size pellets soften faster than larger pellets. Sometimes different batches or brands of pellets will require slightly more or less water. Lower quality pellets of less than 40% protein will usually not soften properly and will either become crumbly or mushy. Experiment for what works best for your needs.
Shake pellets and water for one full minute or until ALL water is absorbed so NO "gravy" remains. Water soluble nutrients will leach from the pellets when the pellets are too damp and mushy with a gravy. Pellets should be shaken once to three times within the next 10 to 30 minutes to keep individual pellets from sticking together. When done, you want ALL pellets to have a very similar softness but definitely not mushy. Pellets too soft/mushy cannot be molded into a larger pellet. When properly softened, the pellets will stick together and mold like damp clay or cookie dough while not sticking to your fingers. Pellets can be rolled and made larger or smaller when hydrated. Sticky pellets means that too much water was added. It is the carbohydrates in the pellets that allows them to be pliable.
The soaking container that I use (1.5gal) has a lid. I think this helps during the shaking and soaking process to retain the moisture and prevents excessive drying of pellets so they remain more pliable and damp during the soaking process. Use a smaller container for small batches of pellets. Cecil Baird developed his method of container shaking by using a "ziploc" bag as a container to hydrate the pellets.
I let the pellets soak up water for 2 to 6 hours; longer time is usually better and produces a more pliable pellet. I often start the soaking process the night before I plan to feed the fish. Using hot water to soak pellets or heating wet pellets in the microwave often causes them to hydrate faster. Heat should not lower the nutritional quality of the pellets because the pellets mixture was manufactured was heated during the pellet making process.
Soaking times may vary somewhat depending on pellet size and BRAND of feed. Higher protein pellets usually soften better and quicker and become more pliable than other brands. If pellets are too dry after several hours of soaking, I spray / sprinkle a mist or sprinkle water on them several minutes before feeding - allow to then soak 30min-2hrs. I built a water sprinkler out of a 2 qt juice bottle and I shake pellets as I sprinkle and shake even coating of water on pellets and allow them to soak 20-30 minutes longer, providing that you want the best moldable pellets. Note - Fish will usually eat a pellet that is not a perfectly soft and has a fairly hard center.
Aquamax pellets, 24 hours after soaking and when stored in the refrigerator, tend to lose their pliability and become crumbly. Optimal and Skretting Brand usually do not do this. When crumbly pellets are still soft and edible by fish,,,but it is harder to form them into a larger damp pellet. Other fish food brands such as Skretting/Silver Cup, Zeigler, and Optimal will maintain good pliability after 24 hrs in the refrigerator. I often feed the day old, damp, crumbly pellets to non-sport fish such as shiners and minnows.
Damp pellets will form mold fairly quickly. Be watchful of this and do not feed moldy food to your fish.
Critics have commented that the soft pellets will leach valuable nutrients form the pellet as is lays in the pond water. My experience is the fish quickly eat the pellets as soon as they hit the water. Thus IMO few nutrients are lost from hydrated pellets and a gravy did not form. Plus if you are making larger pellets from smaller soft pellets a majority of the nutrients are buried inside the large sinking pellet which is very quickly eaten by hungry fish.
More reading: Pond Boss Magazine May-June 2008. SPECIAL SECTION FISH FEEDING ISSUE. One article was THE SOFTER SIDE OF FEEDING FISH by Bill Cody. He explains details how to soften hard fish food pellets plus the benefits and varied uses for moist or hydrated fish foods.
Thread of another benefit of Hydrating Pellets
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=422984