- 30-day returns on unused items
- Authentic brands from official distributors
Details
Track CO2 levels in your planted aquarium at a glance with a color-changing glass indicator.
- Glass CO2 indicator, 3.1 cm
- Color change in test liquid shows CO2 status
- Suction cup attaches to inside aquarium glass
- Opening faces down when mounted
- Designed for planted aquariums with live plants
Who it's for: Aquarists who keep live plants and want a visual check on carbon dioxide levels in their tank.
Key benefits
- Visual check on CO2 levels
- Easy color-based reading
- Simple suction cup mounting
- Helpful for planted tank monitoring
How to use
Our Policies
Unused items in their original packaging can be returned within 30 days of delivery.
US orders over $75 ship free; below that, shipping is $9.99. Other countries see the rate at checkout. If customs charges you on delivery, send us the receipt and we refund it.
You can return unused items in their original packaging within 30 days of delivery. Opened cosmetics can't come back for a change of mind, but we always replace or refund items that arrive damaged, defective or wrong.
Skip, pause or cancel anytime from your account. There's no minimum number of orders and no cancellation fee, and we email you before each renewal.
The terms that apply when you use our store and place an order.
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