Peace be upon you A male Betta fish for sale with its tank. Tank capacity: 20 liters Additional lighting and a 50-watt heater to maintain a suitable temperature for the fish. Biological sponge filter. (The tank is almost fully cycled) and the nitrogen cycle is a type of bacteria not harmful to humans that feeds on fish waste, keeping the water clean. Change a quarter of the tank water once a week and use a dechlorinator, which you can find sold in pet stores or on Amazon. Regarding water changes, it should be done once a week, changing only a quarter of the tank water and using a dechlorinator that you can find sold in pet stores or on Amazon. The health of the fish and tank is shown in the pictures. Price: 210. The tank cost me much more. Contact via WhatsApp or Haraj.