One of my Neon Tetras has a swollen belly and swimming tale up and head down 45 degree this only started happening this morning after feeding them flakes. So I come home from work and my Tetras belly is back to normal size and swimming normal. After reading afew forums I have decided to fast my Tetras for a day or maybe two. I'm worried this may not fix the problem but only postpone it happening again. Has anyone else had this problem if so can you give me some advice.