I added 10 Dwarf Rainbowfish earlier today. They seem to have settled in OK and were swimming all over the tank. I put three or four flakes of food in and one got a nibble but the rest just ended up on the substrate. In trying to get it out all I ended up doing was making it disintegrate... Is a siphon / gravel cleaner the only way to get it out? (I guess this would remove quite a bit of water just to get rid of one flake) So today's stupid newbie question is what is the easiest way to get rid of uneaten food?