Hurry my tank has fiz and bubbles

[Yellow Tang 2]

i woke up this morning and i look at the tank and all of the surface was bubbles and fiz what is this? And how can i get rid of it?

 

[melosu58]

Where is it coming from?

 

[Yellow Tang 2]

Where is it coming from?

NM i fix it

 

[melosu58]

Well so this thread can help someone else with the same problem how did you fix it and what did you do?

 

[GhostKnife]

Do you have an auto top off if not did you forget to top off? That did happen to me one time before I got the auto top off hooked up. The return pump was pumping half water and half air. Not a good thing but I had only LR in the tank at the time.