I’m assuming brand doesn’t matter so much, right?Try some frozen thawed out krill as well to get him to start eating. Most of mine ate with in the first couple days but I did have one that didn't seem to want to eat right away. He swam by pellets for the first 5-6 days till I bought some krill and thawed out and put in the tank. He sniffed that and started eating the krill then a few days later started eating pellets as well.