
Regardless of the fish size, it will inevitably eat all the pods in a nano tank. There's not enough surface area for them to multiply enough to keep up with the mandarin. Keep in mind that some of your other fish may be eating the pods as well. You can continue to add a bottle of copepods/tigger pods to your tank every couple weeks but that'd be more expensive than just buying one that eats frozen food already. I think a bottle of pods is like $20 or something
Mandarins spend all day picking pods in the rocks and sand. I forgot how many pods they're estimated to eat in a day, but it was a crazy amount. Don't underestimate their feeding needs. It's one of the most beautiful fish in the game which is why so many people end up learning that lesson the hard way
