The GH & KH Test Kit provides a simple and reliable way to measure general hardness (GH) and carbonate hardness (KH) in tap water and freshwater aquariums. Monitoring these key parameters helps aquarists maintain stable water chemistry and create conditions suited to their fish.

Testing GH allows you to understand the overall mineral content of your water, while KH testing measures buffering capacity. Adequate KH levels help prevent rapid pH fluctuations, reducing stress on fish and supporting a more stable aquatic environment. Regular testing also assists in replicating the natural habitat conditions required by specific species.

Please note the outer box is damaged; however, the contents remain suitable for use.

Key Features:

• Tests general hardness (GH) and carbonate hardness (KH)
• Suitable for tap water and freshwater aquariums
• Helps detect risk of pH instability caused by low KH
• Supports accurate habitat replication for fish species
• Simple water testing for routine aquarium maintenance
• Box damaged

Ideal for routine water monitoring, this test kit helps maintain consistent water parameters, supporting fish health and long-term aquarium stability.

Specifications:

• Parameters tested: GH (General Hardness), KH (Carbonate Hardness)
• Suitable for: Tap water and freshwater aquariums
• Condition: Box damaged

Aquacadabra acts as credit broker/intermediary and not as a lender.

Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.