Great! I have a betta fish too. Any brand of betta fodd is really fine, I use "Tetra Bettamin", but "Nutrfin" or "Hikari" are all great. One small pinch in the morning and/or night will fill the betta's stomach. Betta fish like stagnant water, but my hexagon tank actually has an airstone in it, which flters the tank quite nicely. Tank decoration is not really needed, but I put in a small fake plant, and an amethyst rock. Betta fish eat bugs that fall on the surface of the water, so a fun thing to do is dip your finger in very gently on the surface and maybe even wriggle it around, and he will sometimes come up and nip your finger (it obviously doesn't hurt!) Their lifespan is about 2 years and their lots of fun so far (I got mine in August)! Happy betta care!