Ewatson249
Aquarium Advice Activist
My sand bed is producing quite a lot of air bubbles. They are not settling on it but they are coming from underneath as you can see it on the glass. My sand bed is about 2.5" maybe 3" in some places. Could this be the result of nitrates being broken down in the low oxygen area of the sand bed? I'm sure I read somewhere that the bacteria does it by separating the nitrate atom from the oxygen ones? Am I speaking total rubbish.... I have noticed that my nitrates have gone down from 5 to 0ppm over the last 2 days for the first time. Anyone got any ideas?