danielt
Aquarium Advice Regular
- Joined
- Oct 6, 2011
- Messages
- 85
I have a 160 litre tank, and the water is perfect, ie ammonia, nitrite and nitrate levels where they should be. The problem is, the fish are all at the top trying to breathe the air? I've carried out two water changes and still nothing. The tank is planted if that helps. Do I need an oxygen stone perhaps?