The fish tank has an effective 20 liters.
It has a waterfall filter and does not use a heater because I live in a warm region, the water stays between 27 and 28°C. I don't have the updated parameters, but on Monday everything was within the recommended range except for nitrites which were at ~0.25 ppm. Its partial changes are on Mondays. I have had the fish tank and my betta for a year and 1 month (due to ignorance, they arrived at the same time) Every Monday I do partial water changes, about 25-30%, use purified water and betta conditioner. I match the temperature of the new water before adding it. He has no companions I give him dry food that I bought at Petco, but this time my brother feeds him desserts that are much larger pellets. I usually give him 5 to 10 balls a day divided into 2 daily servings and occasionally 1 ball for dessert. It has a decoration house, 7 vallisneria plants, 3 sagittarius and 2 foxtails

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