I have 2 small/mini sponge filters in my small 5G tanks and i can't find a small airstone to fit in there and quite them down a bit.
Are there any other ways apart from airstones that could lower the noise of the bubbling?
I thought of a small piece of foam to break up the large bubbles but haven't tried it.
Are there any other ways apart from airstones that could lower the noise of the bubbling?
I thought of a small piece of foam to break up the large bubbles but haven't tried it.