Glass CO2 Drop Checker
$15.00
A glass CO2 drop checker with included indicator test liquid — gives a simple colour-coded readout (blue/green/yellow) of your aquarium’s CO2 levels to help you dial in safe, effective CO2 injection.
30 in stock
Keep track of your aquarium’s CO2 levels at a glance with the TNA Glass CO2 Drop Checker. This simple, reliable tool uses a colour-changing indicator solution to give you a visual readout of dissolved CO2 in your tank, helping you dial in the perfect balance for healthy plant growth without over-gassing your livestock.
The drop checker works by holding a small pocket of indicator solution above the waterline (inside the glass bulb), which is exposed to the tank’s atmosphere through a controlled air gap. As CO2 from the water equilibrates with the solution, the liquid changes colour to indicate whether your CO2 levels are too low, ideal, or too high.
What’s Included
- Glass CO2 drop checker
- CO2 indicator test liquid
How It Works
- Blue — CO2 levels too low
- Green — CO2 levels in the ideal range
- Yellow — CO2 levels too high (risk to fish and shrimp)
Simply fill the checker with the included indicator liquid, attach it to the inside of your aquarium glass (suction cup mount), and check the colour daily — ideally at the same time each day, as CO2 levels naturally fluctuate over a 24-hour photoperiod.
Why Choose a Drop Checker
- Provides a simple, reliable long-term CO2 reading (unlike instant/momentary bubble counters)
- Helps prevent CO2 overdosing, protecting fish and shrimp from gas-related stress or death
- Essential tool for dialling in and maintaining consistent CO2 levels in planted tanks
- Reusable glass design — simply refill with test liquid as needed
Ideal For
Any CO2-injected planted aquarium, shrimp keepers wanting to closely monitor CO2 safety levels, and aquascapers fine-tuning their CO2 injection rate for optimal plant growth.
The shipping prices are determined by Australia Post, and we do not make any profit from postage fees. Any variation in price is solely due to packaging. Our aim is to offer you the most competitive rates for shipping your orders. At Green Aquarium, we strive to provide you with the best shipping options for your aquatic plants, fertilisers, shrimp, and fish. Please review the following information regarding our shipping and delivery services:
Shipping Options:
- Express Post: Recommended for purchasing plants, shrimp, and fish. Plants will be carefully packed in a small express post box, secured in a plastic bag with a small amount of water, and wrapped in bubble wrap for added protection.
- Styrofoam Box Express: Specifically for shipping live shrimp and fish. We use a sturdy Styrofoam box and send it via express post to ensure the safety and well-being of your aquatic pets during transit.
- Registered Post for Fertilisers: Suitable for shipping fertilisers. Your order will be sent via registered post, providing a secure and reliable delivery option.
- Express Post for Fertilisers: If you prefer faster delivery for your fertilisers, we offer express post services.
Please Note: The prices for shipping are set by Australia Post, and we do not make any profit from postage fees. Any difference in price would be due to packaging. We strive to provide you with the best available rates for shipping your orders.
Shipping within Australia: We currently offer shipping services within Australia only. We apologise for any inconvenience caused and appreciate your understanding.
Local Delivery: If you're in the vicinity or would like to avoid shipping fees, we invite you to select the local delivery option at checkout. Before placing your order, please contact us via email, SMS, or phone call to confirm if this option is available for your area. Additionally, reach out to us to schedule a specific time and date for the delivery. Opting for local delivery is an excellent way to reduce shipping expenses.
Pick-Up Option: If you're located nearby or prefer to save on shipping costs, we welcome you to choose the pick-up option during the checkout process. Our address for pick-up will be provided upon completion of your order. Opting for pick-up is a great way to save on shipping expenses.
Shipping Address Requirements: Please note that we do not ship to PO Boxes. Kindly provide a valid residential or commercial address during the checkout process to ensure successful delivery.
If you have any questions or require further assistance regarding our shipping and delivery services, please don't hesitate to contact our customer support team. We are here to help you with any queries you may have.
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