So ever since I got Kudo in May he just keeps moving up in size until now where is in a nice big comfy 10 gallon tank. He went from a 1/4 gallon, 1 gallon, 5 gallon to a 10 gallon. When I first got him I had no idea I could put other fish with him and though I was excited to learn I could, I always made sure he was properly taken care of first and foremost. I have tried putting cardinal tetra (NOT neon tetra) in there with him and at first in the 5 gallon it worked but when I switched to a 10 gallon they passed away. After my tank was cycled I tried to put another 6 tetra in there but now I'm down to two. I don't think I will try again with the cardinal tetra, I read somewhere last night that they are not actually recommended for beginner aquarists and that I was misled by the manager of the fish department at PJ Pets. I hate that they passed away and I hope the final two I have left don't. They seem to be okay, eating bloodworms and flakes. My two ADFs Hip and Hop seem to be doing well though I haven't seem them eat yet and that worries me, though I have seen them on the bottom of the tank. I'm HOPING that meant they were hunting for the food. Kudo eats like a champ, he knows that in the morning it's feeding time and right before I go to bed it's feeding time again. He's an amazing little guy and I love him. I would like to put some little fish in with him but I'm going to try and read up on different species of tetra, possibly neon? And see if I can get one that is more suitable to my newbie status. I'm also looking into getting a snail or ghost shrimp to help with the left over food in the bottom of the tank, I have to price check ghost shrimp here in Ontario and see how much they are. Anyways that's all for my first post. Talk soon!