Review on Aquarium Tubing High Pressurized 6X4Mm by Charity Johnson

Great diffuser. I replaced my previous built in diffuser with this which was more expensive than this one and had a poor diffusion rate and yes it was clean. The resulting CO2 creates bubbles so small they look like smoke. CO2 dissipates quickly and the only bubbles in my tank are O2 from my plants. The plants are growing much faster and looking much better, although my drop checker was green when I ran the old diffuser. This shows you that the color of the check doesn't actually mean you're crouching. I doubted I would buy it because of the lower price but I was very pleasantly surprised. I found the quality very good.