I have been doing some research on CO2 diffusers for CO2 misting. There is the well known Aqua Design Amano pollen glass and pollen glass beetle models. Then there seem to be a variety of other what seem to be knock offs. Has anybody had experience using the ADA and knock offs? Is it worth the 3x-5x price increase to get the ADA's? Anybody know the difference between the ADA's versus the others? Better quality? Finer misting?