JBL PROAQUATEST NH4 Ammonium Refill – Reagent Top-Up
Keep your testing routine on track with the JBL PROAQUATEST NH4 Ammonium Refill. This convenient top-up restores your kit’s capacity to measure ammonium (NH4+) in freshwater and marine aquariums, helping you spot issues early and protect fish health.
Why choose the refill?
- Cost-effective: Replace only the reagents you use most.
- Less waste: Reuse your existing cuvette and colour card.
- Consistent accuracy: Fresh reagents for clear, repeatable readings.
- Versatile: Suitable for new tank cycling and routine checks.
What’s included
- Replacement liquid reagents for NH4 (ammonium) testing
Note: This is a refill pack. It does not include a test vial/cuvette, measuring syringe/spoon, or the colour comparison chart. Use with your existing JBL PROAQUATEST NH4 Ammonium kit.
How to use (with your existing kit)
- Rinse the original JBL vial with sample water and fill to the marked line.
- Add the specified drops of the refill reagents as per your kit’s instructions.
- Cap, mix gently, and wait for the indicated reaction time.
- Compare the colour to your JBL NH4 chart under neutral light.
- Record results to track trends and adjust maintenance.
Pro tips
- During cycling: Test NH4 frequently until the system stabilises.
- Pair with pH: Use a pH reading to assess potential NH3 (free ammonia) risk.
- Good practice: Avoid overfeeding and maintain filter media properly.
- If NH4 rises: Perform partial water changes and review stocking/feeding.
FAQs
Is the refill suitable for saltwater?
Yes. It can be used in both freshwater and marine aquariums.
Does it include a colour chart or vial?
No. Reuse the accessories from your original JBL NH4 kit.
How often should I test?
Every 1–2 days during cycling or after major changes; weekly for routine monitoring.


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