Colombo KH Test Kit

Code: 05020297
  • $8.01
  • RRP $8.55
Item in Stock | Usually dispatched within 24 hours
Order within for delivery Tuesday 27th July with Express Delivery

Why buy from Pond Planet?

14 day returns On all our items
100% Secure Shop in confidence
Excellent Value Amazing prices!
Free delivery on orders over £49*
  • Suitable for ponds and both freshwater and saltwater aquariums
  • Easy to use
  • Fast & accurate results
  • Liquid and powder reagents
  • Contains 25 Tests

The Colombo KH Test Kit contains all you need for accurate measurement of the KH level in ponds and both freshwater and saltwater aquariums. The Colombo KH Test Kit comes complete with test tube and liquid reagents to provide accurate results for 25 tests.

The KH is the so-called carbonate hardness or temporary hardness; in German Karbonathärte, abbreviated to KH. The KH is made up by forms of carbonic acid like bicarbonate and carbonate. The chemical balance between these substances leads to a stable pH and thus the adequate presence of these substances is essential for a stable pH; a stable pH in its turn is essential for the well-being of the fish. The KH is therefore often called the buffering capacity of the water. Especially in older aquaria and ponds, the pH and KH have a tendency to decrease, especially when there are no or little water changes. Hence, test the KH regularly and refresh 10% of the water weekly. An optimal pH-buffer in freshwater is obtained with a KH between 6 and 8°DH, in seawater with a KH between 8 and 12°DH. When the KH is above 12°DH, also the pH will be relatively high, and so you can lower both values in freshwater with Colombo pH-min. If the KH is lower than 6 or 8°DH, you can increase it with Colombo KH+.

Instructions For Use:
1. Take a water sample of 5ml.
2. Add 1 drop of KH-test fluid and mix. The sample should turn light-blue; when it turns yellow, the KH of the water is lower than 1°DH.
3. Add KH-test fluid drop by drop and mix each time, until the sample turns yellow.
4. The number of drops added to induce the colour change from blue to yellow, is equal to KH-value in °DH, so 2 drops = 2°DH, 3 drops = 3°DH and so on.

Showing our 1 review for Colombo KH Test Kit. Write a review
Review Summary - 5 out of 5 based on 1 rating.
December 5, 2020 | Gary Hale
KH Test Kit

As Above

UK Delivery

Order before 2:00pm for same day dispatch.

Orders under £49

Standard Delivery Service - £3.95
Delivery takes 1-2 working days.

UK Express Delivery - £5.95
Upgrade your order to next working day delivery.

Orders Over £49

UK Express Delivery - FREE!
FREE next working day courier delivery via DPD Local.


Click Here For Full Terms & Conditions


If for any reason you are not satisfied with your purchase from Pond Planet, you may return the product(s) to us within 14 days of the purchase date for a refund or exchange.

Goods must be returned in perfect and unused condition, in their original packaging. The buyer must ensures that the goods are securely and adequately packed to avoid damage and the purchaser pays all postage costs. We recommend that products are returned by recorded delivery or by carrier that requires a signature. Pond Planet accepts no responsibility for goods returned to us unless signed proof can be provided.


Click Here For Full Terms & Conditions


You can use any of the payment types listed at the bottom of the page to pay for your order. Your details are safe with us as we take security very seriously indeed.

We also take fraud very seriously so all credit and debit card transactions are subject to validation, authorisation and security checks by both the card issuer and ourselves.

Please note - We DON'T store your credit card details on line.


We are committed to protecting your privacy. We will only use the information that we collect about you lawfully (in accordance with the Data Protection Act 1998) and inline with our Privacy Policy. 

We collect information about you for two reasons: firstly, to process your order and second, to provide you with the best possible service.

We will not email you in the future unless you have given your consent and will give you the chance to refuse any marketing email from thereafter.


Click Here For Our Full Privacy Policy