This is what I use on my obsidian 45. isonic P4810. It has a 30 minute timer that I run twice in a row with a 1:1 simple green/distilled water solution.

Just a heads up, the plastic basket that comes with it broke after 2 uses and the company considers it an "accessory" that isn't covered by warranty.

Does this just have a 5-minute cycle? While that's fine if you're just going to use this to clean atomizers, it's not long enough to use as a speed-steep device. I own this model, which can cycle up to 30 minutes.