At that size, I would wait til he grows a little more to really starve him. I wouldn't feed him or offer him any food for 3 days and then drop him a good pellet like NLS or Omega 1. If he doesn't take it the 1st time, which I'm sure he won't, give him some shrimp or krill just for that 1 day, then repeat... maybe even try stuffing some pellets in there and see if he'll take them that way. Once he gets to around 5-6", u could probably starve him a little longer
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u mean like putting pellets into a small shrimp/ and feed him? nver tried it bfore but i will.