Yes the stuff you take yourself, or should be as I do.
You can only put some of that oil on something dry like some pellets or flakes. Never on wet or frozen foods as it will just wash off as soon as it hits the water. It will not make your skimmer go crazy, but it will completely stop your skimmer from foaming for an hour or so. I put about 20 pellets in a small container, add 2 drops of oil and shake it up. Then after an hour or so, I give it to the fish. It needs some time to sink in.
If you feed live worms and clams as I do, your fish should start to spawn and die only from old age which in some fish is 30 years old. Most smaller fish live about 12 years and clowns live about 28 years. Tangs are someplace in the middle. If your fish are dying sooner, or getting sick, they are not very healthy.
I would not give them oil every day, maybe once a week if you are feeding as I suggest.
dz6t, some of my spawning fish are 25 years old, I never quarantine and my fish have not gotten any type of disease in probably 30 years. That is how I came by my theories, my reef is also 45 years old.
12 year old watchman with her eggs. (maybe she is a watchgirl)