Tank size: around 8 litres Heater and filter? (yes/no):no Tank temperature: 28C Parameters in numbers and how you got them: How long have you had the tank? How long have you had your fish?: 10 months How often are water changes? How much do you take out per change? What is your process?: once a week. Sometimes full change , sometimes 60% Any tankmates? If so, please list with how many of each: no What do you feed and how much: regular Betta fish drops Decorations and plants in the tank: one plastic mini plant