I have 2 zebra danios and 2 leopard danios in my 10G tank. I have been feeding them tropical flakes, which are way too big for them to eat so I have to break the big flakes into smaller flakes. I have used tropical flakes since I got them which was last thursday. What else can I feed them? I have noticed that some people feed fish vegetables but I don't know if Danios can handle that.