Aquariums: Is this tank cycled? Dosed in ammonia, got a nitrite and nitrate spike. Nitrite and nitrate have both returned to 0, but API test isn’t quite showing yellow for ammonia. Is this an error? It’s been that slight green for weeks.
Betta Fish Betta Fish: The change of my female koi betta in ~1 month from cup to tankDecember 21, 2025
