Brightwell Aquatics Cold-Season Biological Treatment supports pond health during winter and spring when plant growth naturally slows. This formula introduces beneficial microorganisms that help maintain biological filtration, consume organic waste, and improve overall water conditions. It is especially effective in ponds with higher feeding levels or significant organic build-up.

Key Features

• Maintains biological filtration when plant activity is low

• Encourages healthy plant growth and helps reduce algae presence

• Improves water clarity, often within 60 minutes of application

• Reduces pond odour and hydrogen sulfide production

• Breaks down uneaten food, fish waste, and decaying plant matter

• Increases dissolved oxygen and helps clean the pond substrate naturally

• Effective in heavily stocked or high-feed ponds during cold seasons

This treatment can be used regularly through colder months to keep water clear, reduce sludge build-up, and promote a cleaner, healthier pond environment without manual cleaning.

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.