Hi there, I have had my betta/siamese fighting fish 10 days now and he won't eat! He is in a 19L Fluval Chi tank with 5 little Mountain Minnows who love their food. They were in the same tank together in the pet shop. I got him a 25watt heater 2 days ago (even though the pet shop said I didn't need one) to see if that will make him happier and i have the heater at 23oC. Will my minnows be ok at this temperature? I have tried my betta on flake food and bloodworms but he still won't eat. Have done all the instructions which came with the tank such as 10% water changes, adding the good bacteria stuff (sorry I forget what its called). I got my tank about 5 days before the fish so the water was ready. I have artificial plants in it and gravel at the bottom. Does anyone have any suggestions to help me? I am a novice and I just want my little man to be happy. Thanks.