I always liked the bubbles even though they aren't "natural". It helps move the water column upward and helps with c02 diffusion, agitates the surface for increased 02 absorption. I use the blake tubing with the zoo meds magnets tubing clips. I also don't use air stones because they are always clogging up and causing the pump to run harder. I just run the bare end tubing under a lava rock that I drilled holes in. The bubbles are much larger and thus move more water to the surface.