Hey there Mako,
Were you trying to get a hold of us? We haven't received any emails or calls regarding O-ring questions, and this is the first we've seen your questions. Sorry for the delay!
All of our bubblers come with all the necessary O-rings. Once you find the right size, you can order 3-packs of that particular size from our website. No need to order anything additional, Obsidian comes with everything you need to make your Volcano active
Were you trying to get a hold of us? We haven't received any emails or calls regarding O-ring questions, and this is the first we've seen your questions. Sorry for the delay!
All of our bubblers come with all the necessary O-rings. Once you find the right size, you can order 3-packs of that particular size from our website. No need to order anything additional, Obsidian comes with everything you need to make your Volcano active