thats fine i turned off my filters for like 10min when my bgk was still getting used to feeding, luckily the lfs already had him switched to pellets so i didnt have to do much but you will definitely need to get him some sinking food freeze dried is OK for fish that feed from the top but i still like to stay away from it, i gave mine some frozen brine shrimp and he ate it right up when i first got mine i had to turn off all the lights to get him to eat at first, now i just have to turn off the tank lights and he comes out to eat though still reclusive, they are supposed to get more outgoing as they get bigger, oh and always thaw out the frozen food in a cup of tank water before adding it to the tank so that they are not eating it cold as this will mess with their internal chemistry (this is for any fish not just bgk)