My first barbs ran me about $25 each. The ones in the pic above were more like $2.75 as imports. They are sold by the box lot of 50 fish.
Since my barbs are in a tank with only clown loaches, two of which are quite large, I feed most of the food specifically for them. So that means a lot of sinking foods. I feed my flake mix for the barbs then. But my clowns are pigs and the biggest at over 10 inches, and fat, is a pig and will eat the flake as soon as it hits the water. But that fish knows the good sinking stuff comes in next.
When I feed my frozen food mix the barbs are happy to eat that as it sinks slowly. (Mysis and brine shrimp, daphnia- occasionally blood worms.) The barbs are not big on the Repashy and my choice of foods is tilted towards my clowns, corys and especially plecos. When I feed my Repashy mixes, the barbs again get flakes, But, I also have Omega One color boosting flakes I will feed now and then. My my flake mix only has about 10% color boosting flake but it includes immune boosting, veggie and algae flakes. I use basic flake mix and then add the other flakes. I may add some Black worm flakes to the mix when I can get them.
When I mix the Repashy, I do it in smallish casserole containers where it then cools. After I take out the slab, there is a thin film of food left behind. I can peel it off and that I feed to the barbs. The thickness makes something almost like a flake which doesn't sink fast, so the barbs can easily get it. Since I freeze most of the batched Repashy food cut into pieces, I only get the thin bits once every few months when I make it.
There is one more consideration in feeding that tank. Long ago I made the mistake of using large sized river gravel in the clown tank when it was a 75 gal. Sand, or even much smaller gravel. was the much better choice, but I did not do sand back when. Plus the big gravel was cheaper to do. So,the barbs cannot get at food in the crevices between the stones or below the surface. The clowns, on the other hand, figured out long ago how to dig by picking up the large gravel a piece at a time and then tossing it aside. Often the gravel hits the glass and you can hear it.
For a number of years, on a long defunct fish forum and chat site, I was friendly with a gent my age from TN. He had 50+ years in the pet and fish trade. He worked on all levels of fish from selling in pet and fish stores to working wholesale and breeding. He owned his own store once or twice. I learned a lot from him. By chance I wound up with too many clowns and a number were in the 3 -4 inch range. He qaw down one tank, a 135 gal. (and a pond). He had clowns in his tank. So I sent him 3 of my "overflow."
Not long after he got them we met in the fish chat where he complained to me that my clowns had taught his to pick up and throw big gravel and small stones. So much for those who say fish cannot learn.