ADA · Diffuser
Pollen Glass Beetle
Pressurised CO2 tanks where you want a neat, nearly invisible diffuser and are happy to clean glass now and then.

UNS · Bubble counter
A small detachable bubble counter with a check valve built in. It lets you see and set your bubble rate while stopping water from running back into the regulator.
Updated
Fine-tuning bubble rate on any UNS regulator, or as a spare.
Figures from Glass Aqua's product listing. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
ADA · Diffuser
Pressurised CO2 tanks where you want a neat, nearly invisible diffuser and are happy to clean glass now and then.
ADA · Diffuser
Small to medium pressurised CO2 tanks where an upright glass diffuser suits the look.
ADA · Regulator
Keepers running pressurised CO2 who want finer adjustment than their regulator gives, or split lines to two tanks.
Qanvee · Diffuser
Planted tanks with a canister filter, especially 190 L and up, where you want hidden CO2 hardware.
Quick answers about the UNS Micro CO2 Bubble Counter, drawn from its specs.
Fine-tuning bubble rate on any UNS regulator, or as a spare.
Other co2 worth comparing: ADA Pollen Glass Beetle, ADA Pollen Glass Type 3, ADA PS-SC Speed Controller. Add any of them to the compare table to see the specs side by side.
Tap Compare on this page and on any other CO2 product you are considering, then open the compare table. It lines up every published spec side by side and lets you pick the size of each product.
From Glass Aqua's listing, cross-checked where we could. Confirm current figures before buying.