Adding airstones to sponge filters

Today, i will show you how i add airstones to your smaller sponge filters with only 1 inside chamber.

So first thing, grab your sponge filter:




Then, completely disassemble it:




Pick up your chamber or cage as I like to call it and look at the bottom:




And cut those little inside spokes to remove the tube in the middle:






After that is removed, take your airline and add the tube, top piece, and airstone:





And assemble the spong filter:






Then hook up to your air pump and enjoy!