Especially their accessories--since they are quite affordable I just wanted to ask around if anyone has used them and if they are reliable? Buying oxygen concentrator and ozonator just set me back quite much so I'm trying to save some bucks here...

https://drosolutions.com/shop-full-width/

And if someone can point to where to get low flow regulator less than $100 usable for ozone concentrator? Mine is Devilbiss 525ds. Thanks!