This question has 3 little questions. Let me give you the setting. My tank- approximately 9 gallon tank. If i fill it to the top it would reach 10, but that would be too high for the filter. Inside the tank there is a: -good filter -medium sized coral tunnel thing - tall fake plant - one betta -there is No Heater My betta- from what I've heard,Betta's typically do not get along well with most fish. I think my betta is a very laid back type of fish. When I hold a mirror in front of it it glances cautiously maybe just keeps swimming, but doesn't start flaring until the mirror is either touching the glass or one inch away. Then he flares for maximum 5 seconds and swims away quickly. I hear that a type of fish compatible with bettas are platys. I would like to add 1 or 2 platys to my tank (same gender so they don't reproduce) and have a few questions. 1. Should i get One or two platys? 2. Would they get along with the betta? 3. Is the tank suitable for this setup? 4. If it does end up working out, how would i feed them? Bettas are supposed to be fed every other day and platys are twice a day! Thank you for your help!