Tobykourtney
Aquarium Advice Addict
- Joined
- Feb 16, 2013
- Messages
- 1,347
I've lost 3 tiger barbs over the past 3 days and today they were at the surface gasping for air. During the day with the co2 on they're all fine. Could it be possible that the plants are putting out enough carbon at night to kill the fish? I put an aerator in the tank and after 15 minutes the fish were fine. I'm going to buy a timer today and set it so it goes on when the lights go out.