Recently I noticed a huge overpowering smell to one my bettas tanks, Donny's and a small smell of it onto my other tank, Atlas.
I was wondering what is the sulfur smell from and what is something I can do? I googled and it seems I have too much bacteria in the tank..?
For both tanks, since I...
What size is your tank? 10g
What temperature is your tank? 78-82 degrees Fahrenheit
Does your tank have a filter? yes (sponge filter)
Does your tank have an air stone or other type of aeration? yes
Is your tank heated? yes
What tank mates does your betta fish live with? divided tank...