I have 2 20g high tanks. They are just not that big. I think if you add too many fish, you won't like the crowded appearance and the fish won't like
Battery for my tractor.
Items range from 6-8 months old. Will bundle, open to reasonable offers. Payment through paypal, shipping through usps. Will flat rate whatever I can,
CO2 and Oxygen levels are independent of each other, and although CO2 can get high enough to nuke things that doesn't sound like what happened.