I have about 7 zebra Danios currently that are all full grown and bought 3 new ones today. However, I didn't realize how small these Danios were until starting to acclimate them to my current tank. My largest danio is about 3x the size of the smallest I bought today. I'm not sure now if it's a good idea to release these 3 new ones into my tank or if setting them aside in a smaller tank I have is a better option until they've gotten a little bigger? Ik a school is 5 but I'm worried about these little ones getting attacked by the larger danios. Any advice is greatly appreciated.