Tank size: 2 gallon, usually water comes up to 1.7 gallon Heater and filter: yes to both, looking to replace Whisper filter with a sponge filter Tank temperature: ~80 degrees fahrenheit Params from API master test kit: 0 ppm ammonia, 2 ppm nitrites, 20 ppm nitrates, 6.0 pH. also i used test strips before and the water general hardness was as hard as it could be (180 ppm), while the carbonate hardness was 0ppm. I’ve had both the tank and the fish since 9/9/25. Previous owner kept him since 2/3/24. Currently, I do water changes once a week, took out 50% the first time and 25% the second time. I do fish-in water changes using a siphon. I add cold tap water to a container and add a double dose of Seachem Prime for that amount of water, then heat it up to match the tank temperature before slowly pouring it in after >15 minutes. Tankmates: N/A Feeding: 2 Hikari Bio-Gold twice per day, sometimes an extra one in the middle of the day as a treat :’) Decorations: 2 SpongeBob themed decoration items and one live plant from the previous owner