Check₂O Aquarium Nitrate - Nitrite
Check₂O Aquarium Nitrate - Nitrite
0 - 10 - 25 - 50 - 100 - 250 mg/L NO₃⁻
0 - 0.5 - 1 - 5 - 10 mg/L NO₂⁻
Nitrate is formed by conversion of nitrite via nitrifying bacteria on the biofilter. Except in very high concentrations, nitrate is nontoxic to aquatic life. This nitrate can be removed in two different ways. Nitrates are important nutrients for plants and can be absorbed by any aquatic plants that are in the environment. Nitrates can also be removed on the biofilter by denitrifying bacteria via a conversion to nitrogen gas. Starting from ammonia this is known as the nitrogen cycle. In a stable aquarium, conversion of ammonia through to nitrogen gas should proceed without any detectable problems.
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.