OK, I'm back on my PC; I was in the clinic for my chemo treatment yesterday, and checking things on my mobile but the keyboard is so small and cumbersome for me, I only do "emergency" short messages. I'll now explainb my issue with freeze dried foods.
Back in the early 1980's when I got into the hobby, freeze-dried was often suggested as being superior to regular dried foods (may have been somewhat true, there were not the quality dried foods we now have) and second only to frozen or live, but more convenient. However, the enthusiasm didn't last and soon one heard little if anything about their "superiority," and they rather dropped out of fashion. The big problem with FD is that when they get in the tank water, they begin to soak up water, and quite a lot since they are so dried out. Eager fish will always snap up food. This FD enters the fish's digestive system, it begins to soak up liquids, and...you guessed it, same as what happens with humans, the food expands and the fish suffers digestive problems. Some will advise soaking the food first, and that would help. But the quality of FD is just not worth this, given the advancements in regular dried foods.
Which brings me to the late Jack Wattley. I'll post a link to a fitting tribute to Jack's life below if you are interested in this fascinating aquarist who did so much for the hobby in his 90+ years, he died in 2018. Jack had a monthly column in
Tropical Fish Hobbyist for many years, in which he answered questions from readers; he was acknowledged by all as "the" authority on discus. Several columns were naturally related to food especially for discus. There was a time when dried foods were not encouraged, and Jack and others came up with "fresh" preparations of their own, with great success, replacing the need for live foods, something once thought impossible to achieve. In the last decade or two, Jack frequently stated that the high quality dried foods available today could not surpass even live foods in their nutritional benefits for discus, and he fed them exclusively.
I have been feeding strictly dried foods for the past several years now, with frozen (fresh frozen) once a week as a "treat." I use
Omega One Veggie Flake, Omega One Veggie Rounds, and
Omega One Shrimp Pellets, and
New Life Spectrum basic flake. I selected these primarily on the advise of other members concerning the ingredients. From Omega One's website:
Only fresh seafoods are used in our formulas - it’s as simple as that. All other fish food manufactures rely on fishmeal as the main ingredient in their foods. Check the ingredient labels! Omega One fish foods are fishmeal and hydrosylate-free, which means they contain a higher level of natural nutrition than any other fish foods in the world.
NLS is similar, and you can rad about fish nutrition and digestive problems on their website.
To this group of foods I add a third, Nutrafin's
Bug Bites; Hagen produce these, as well as the Fluval brand, so presumably they are much the same. You can see some reviews at the second link below. I use the smallest micro size, and stir them into the tank water as soon as I add a small quantity so they sink faster. All cories absolutely go nuts over these, not surprising since they are primarily insects. Ian Fuller has endorsed them, and I feed them twice, sometimes three times weekly.
Remembering Jack Wattley - Tropical Edu International
Fluval Bug Bites Fish Food - Is it any good? ( Review and Breakdown ) (tropicalfish.io)