I purchased a reticulated puffer from my lfs a few weeks ago and looked pretty healthy and active in the store. I brought him home and he was fairly active the first week and ate everything out of my hand. He hasn't ate anything in the second week and seems pretty lazy and always stayed at the same corner of the tank. It's been the third week and still hasn't shown much interest when trying to feed him. I have noticed him to be a little more active lately. It's definitely not ick because the tank was treated with copper and he shows no visible spots. The other tank inhabitants are three eels that don't bother him. He looks overall healthy as you can see in the picture but it's been about 2 weeks that he hasn't shown interest in food. I have fed him silver sides and scallops in the past. I dozed the tank weekly with garlic and selcon. Any idea if this is normal behavior? Also any advice on what to get him to finally start chowing down again? I have to admit I have not tested the water parameters because this is my first fish only. I do 20% water changes every week. I will test water parameters tody