Sera kH Test Kit

Sera kH Test Kit

Sera kH Test Kit is a water test kit for checking carbonate hardness (kH) in both freshwater and saltwater aquariums. It suits fishkeepers who want a straightforward way to keep track of this core water parameter.

Key Benefits

• Measures carbonate hardness, the buffering capacity of your aquarium water that helps keep pH steady.
• Works in both fresh and salt water, so one kit can cover a community tank, a planted aquascape or a marine system.
• Makes routine kH checks simple. This helps you spot changes before they unsettle your livestock.
• Rated for approximately 390°dKH.
• Made by Sera, a well-known German name in aquarium water care and testing.

Suitable For

• Freshwater aquariums, including community, cichlid and planted tanks.
• Saltwater and marine aquariums.
• Hobbyists across South Africa whose tap water hardness varies from region to region and with the season.
• Anyone setting up a new tank or adjusting water for particular species.

Specifications

• Brand: Sera
• Parameter tested: carbonate hardness (kH)
• Water type: fresh and salt water
• Rating: approx. 390°dKH

What's Included

• One Sera kH Test Kit for testing carbonate hardness in fresh and salt water.

Frequently Asked Questions

What does kH actually measure?
kH stands for carbonate hardness. It shows how well your water can buffer against pH swings. Low kH can let pH drop suddenly, which stresses fish and invertebrates.

Can I use the Sera kH Test Kit in a marine tank?
Yes. The kit is designed to monitor carbonate hardness in both fresh and salt water.

Why should South African fishkeepers test kH?
Municipal and borehole water differs widely between areas in South Africa. Testing kH tells you what your own source water is like and whether it suits the fish you keep.

What does "approx. 390°dKH" mean on this kit?
It is the manufacturer's rating for the kit. The number of individual tests you get depends on how hard your aquarium water is.

Is kH the same as GH?
No. kH is carbonate hardness, which relates to pH buffering. GH is general hardness, which refers to minerals such as calcium and magnesium. This kit tests kH only.

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.

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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.