Colombo KH Plus is a fast-acting treatment that increases carbonate hardness (KH) in pond water, helping to stabilise pH levels. Maintaining the correct KH is essential for a healthy pond, as low levels can lead to sudden pH fluctuations that may harm fish and plants.

Key Features:

• Increases carbonate hardness (KH) levels
• Helps stabilise and maintain consistent pH
• Supports a healthier environment for fish and plants
• 100% natural pond treatment
• Fast-acting and easy to apply
• Available in multiple sizes to suit different pond volumes

By restoring KH to the recommended range of 6–8°DH, Colombo KH Plus helps prevent unstable water conditions. Regular monitoring and adjustment can reduce stress on aquatic life and improve overall pond balance.

Dosage:

• 15 ml per 200 litres raises KH by 2°DH
• Dilute in lukewarm water before adding to the pond
• Do not pour directly onto plants
• Test water monthly and adjust as needed

Available Sizes:

• 1L – treats up to 7,000 litres
• 2.5L – treats up to 17,500 litres
• 5L – treats up to 35,000 litres

For ongoing stability once the desired KH level is reached, consider maintaining water balance with Colombo Balantex.

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.