This is all new to me, and I have a lot to learn. Right now I'm trying to figure out the best food for a community tank. Who knew a fish could become constipated. I only have a few fish in a tank I've had for about three months. Three Rasboras (Pork Chop), one Tuxedo Guppy, one Cherry Barb, and two Panda Catfish in a 20 gallon tall. I had more fish, but unfortunately they suffered due to my lack of experience. I'd been told flake food was all they needed for a diet. I don't believe that now, but don't know what would be best. Open to good advice. Thanks!