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.
3 models
UNS · Drop checker
UNS Drop Checker
A glass drop checker that changes colour with the CO2 level in your tank, giving you an at-a-glance check that injection is in the right range. It comes in a hang-on style for rimless tanks and a suction-cup style for anything else.
Updated
Will it suit my tank?
litres
Best for
Anyone running pressurised CO2 who wants a simple visual check.
Worth knowing
Drop checkers lag the tank by an hour or two, so read them late in the photoperiod.
What stands out
- HD hangs over rimless glass up to 10 mm thick
- SD fixes inside the tank with a suction cup
- 15 ml indicator solution included
- 30 ml refills sold separately
Models and specs
| Model | Fits |
|---|---|
| HD (hang-on)UNSDHD01 | Rimless tanks with glass up to 10 mm |
| SD (suction cup)UNSDCS01 | Any aquarium |
- Brand
- UNS
- Material
- Glass
- Included
- 15 ml indicator solution
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.
Compare with
Browse all co2
ADA · Diffuser
Pollen Glass Type 3
Small to medium pressurised CO2 tanks where an upright glass diffuser suits the look.
1 model
ADA · Regulator
PS-SC Speed Controller
Keepers running pressurised CO2 who want finer adjustment than their regulator gives, or split lines to two tanks.
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Qanvee · Diffuser
Inline CO2 Atomizer
Planted tanks with a canister filter, especially 190 L and up, where you want hidden CO2 hardware.
2 models
Frequently asked questions
Quick answers about the UNS Drop Checker, drawn from its specs.
Who is the UNS Drop Checker best for?
Anyone running pressurised CO2 who wants a simple visual check.
Is there anything to watch out for with the UNS Drop Checker?
Drop checkers lag the tank by an hour or two, so read them late in the photoperiod.
What are the alternatives to the UNS Drop Checker?
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.
What sizes does the UNS Drop Checker come in?
2 options: HD (hang-on), SD (suction cup).