we use a few drops on our frozen and let "marinate"
for a little bit. This is given every few days when we feed. We don't feed daily, some do and probably give them garlic every feeding if they could. Our fishies GOBBLE it up. But be ready, it is a grewsome
smell!!
some days I am ready for it and some days not.
We have never tried it on flake, I don't think it would work well.
Maybe others have a way to make it work for them.