Hello everyone,

I have a question would like to ask.

After two days I did a weekly water change and found out that there are bubbles foaming on the water surface around my hang on filter area, air stone tube and at corner near the filter. May I know what is this happening? It is not fully cover all the surface of the water. It is look like 10/100% of bubbles cover water surface. Do I need to do any immediate action about the tank or it is just I'm over thinking?

Thank you.