I recently was given a betta by someone with the tank, filter, heater and some decorations. They decided they couldn't take care of it anymore. First thing I did was test the water parameters. PH - 8.0 Nitrate 110mg/l Nitrite 0.3 mg/l Ammonia - 0 Not sure about the temperature as there's no thermometer in this tank. I started a water change but there so much food waste and gunk that I can't get it all with one water change. Wondering how I should go about changing the water, should I do daily ones so that the parameters don't change so drastically and stress the fish ? Or should I just change it all?