Colombo Algadrex is a fast-acting green water treatment designed to clear pond water quickly and restore visibility. It works by clumping together floating algae so they can be removed via filtration, netting, or by settling at the bottom, helping improve overall water quality and light levels for plants.

Key Features

• Fast-acting formula clears green water, often within one hour
• Targets free-floating algae that cause cloudy green ponds
• Improves water clarity, light penetration, and oxygen balance
• Clumps algae for easy removal via filter or pond net
• Includes test strip to check KH levels before use
• Suitable for a range of pond sizes with clear dosing guidance
• Available in 500ml, 1L, and 2.5L sizes

Dose accurately based on pond volume: 500ml treats 5,000 litres, 1L treats 10,000 litres, and 2.5L treats 25,000 litres. Always check that KH is at least 6 before use and follow preparation steps, including switching off UV, ozone, and air systems during treatment. After clearing, ongoing maintenance helps keep water clean and balanced.

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.