My cardinal tetras don't seem to like my co2. I let my diy co2 run 24-7 but at night I have a air stone going to let the co2 out. During the day when the air is off the tetras scrape the sides of the tank like they are trying to get out but at night they swim all around. My ph when the air is off hovers around the 6.0 range. But at night it is more like 6.7. What would be best to keep the tetras happy? Should I just ditch the co2? My plants really like it. I've noticed them
Being alot greener with it. What should I do?
Being alot greener with it. What should I do?
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