JBL ProAquaTest KH

JBL ProAquaTest KH – Carbonate Hardness (Alkalinity) Test

Monitor your aquarium’s buffering capacity with the JBL ProAquaTest KH. This titration test measures carbonate hardness (KH) in degrees dKH, helping you stabilise pH and maintain a healthy environment in both freshwater and marine systems.

Why measure KH?

• pH stability: Adequate KH buffers acids and prevents sudden pH swings.
• Biological balance: Supports nitrification and overall system health.
• Plant & coral care: Consistent alkalinity benefits plants (freshwater) and calcifying organisms (marine).

Key features

• Simple titration method: Count drops until colour changes for an instant dKH reading.
• Accurate & repeatable: Fine graduation for reliable results.
• Fast testing: Complete the test in minutes.
• Freshwater & marine compatible.

What’s included

• KH reagent (titrant)
• Test vial / cuvette with cap
• Instruction leaflet

How to use (quick guide)

1. Rinse the vial with sample water and fill to the marked line.
2. Add one drop at a time of KH reagent, swirling gently after each drop.
3. Stop at the distinct colour change (usually from blue/green to yellow).
4. Reading: Number of drops added = KH in dKH (e.g., 6 drops = 6 dKH).
5. Record your result for trend tracking.

Recommended ranges (general guidance)

• Freshwater community: ~3–8 dKH
• Planted aquaria: ~3–6 dKH (with stable CO₂ and pH)
• Marine/Reef (as dKH): ~7–12 dKH

Pro tips

• Test KH weekly, and after large water changes or dosing.
• For low KH, use a buffer or adjust with conditioned tap/RO blends.
• Keep pH, KH, and CO₂ changes gradual to avoid livestock stress.

FAQs

Does this test work in saltwater?
Yes. Results are in dKH and apply to marine alkalinity as well.

How precise is the reading?
Each drop typically represents 1 dKH. For finer control, use consistent sample volume and technique.

My KH is low and pH swings, what now?
Increase KH slowly with a suitable buffer and review your water-change source and CO₂ levels.

With JBL ProAquaTest KH, you can manage buffering capacity confidently and keep your aquarium stable and thriving.