API KH Test Kit for Fresh and Saltwater

API KH Test Kit for Fresh and Saltwater

API KH Test Kit for Fresh and Saltwater is an aquarium test kit that measures carbonate hardness (KH) in both freshwater and saltwater tanks. It suits hobbyists who want to keep a closer eye on water quality and catch invisible problems before they harm fish and plants.

Key Benefits

• Tests carbonate hardness (KH) in freshwater and saltwater aquariums, so one kit covers either setup
• Helps you monitor water quality and spot invisible water problems that can be harmful to fish and plants
• Carbonate hardness stabilises aquarium pH, so knowing your KH helps you understand how steady your pH is likely to be
• Gives you the information to work out the proper dose of pH buffers, rather than guessing
• Comes with easy-to-read instructions, a glass test tube and a colour chart

How to Use

Follow the easy-to-read instructions supplied in the kit. The glass test tube and colour chart are included to help you carry out the test and read your result. Testing regularly lets you track KH over time and notice changes early.

Suitable For

• Freshwater aquariums
• Saltwater aquariums
• Aquarists who want to monitor water quality for the health of their fish and plants
• Anyone who needs a KH reading to determine the proper dose of a pH buffer

What's Included

• 1 test bottle
• Easy-to-read instructions
• Glass test tube
• Colour chart

Frequently Asked Questions

What does this test kit measure?
It measures carbonate hardness (KH) in your aquarium water.

Can I use it in both freshwater and marine tanks?
Yes. It is designed to test fresh or saltwater aquariums for carbonate hardness.

Why does KH matter for my pH?
Carbonate hardness stabilises aquarium pH. Keeping track of KH helps you monitor water quality and avoid invisible problems that can be harmful to fish and plants.

Can the result help me dose a pH buffer?
Yes. KH can be used to determine the proper dose of pH buffers, so testing first helps you adjust with more confidence.

What comes in the box?
You get 1 test bottle, easy-to-read instructions, a glass test tube and a colour chart.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

If you prefer a faster 🚀 shipping option, we also offer The Courier Guy during checkout in the dropdown selection. Please note that this option is not free, and you must choose it to use it. Please pay careful attention to the cutoff times and delivery timeframe for these options during checkout.

Enjoy the convenience of collection points and lockers! 📦

No more waiting at home or at work for your delivery. Simply choose a collection locker or pickup point and collect your order when it suits you.

Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*

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Collection timeframes:

• Bob Box: Collect within 2 days of receiving your collection notification.
• PUDO Lockers: Collect within 36 hours of receiving your collection PIN or SMS notification.

If a PUDO parcel is not collected within 36 hours, it will automatically be transferred to the nearest PUDO Kiosk or Depot at no additional cost. The parcel will then be held there for approximately 2 days before being returned.

Please ensure you collect your parcel within the applicable collection period. Uncollected parcels will be returned to the sender, and additional shipping charges may apply should the order need to be resent.