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Cloverleaf Pre-Vent Blanketweed 4kg (11000gals)

Original price £63.99 - Original price £63.99
Original price
£63.99 - £63.99
Current price £63.99
Pre-Vent is an innovative formulation that aims to succeed where many commercial bacteria cultures fall short.
Pre-Vent poses no threat to any pond fish, vegetation, or biological filtration systems.

To help rebalance your pond, use Pre-Vent about every 10–14 days.
to assist in stopping the tenacious blanketweed from returning.


For every 266 gallons, add 10g (1207L).
You can use the enclosed scoop.
800 gallons or so from one teaspoon (3632L).
With no negative consequences, the dosage can be changed as needed.
After using Cloverleaf Blanket Answer, we advise waiting 10–14 days before starting a dose.

Pre-Vent must be introduced to the pond by being mixed with enough pond water and then uniformly distributed over the pond's surface.
A light overcast appearance will develop over the pond, which will often disappear in a few hours.

Use water that is at least 10 degrees Celsius warmer than the desired outcome.

Pond saturation oxygen levels must be kept at a high level if river-type fish (such as sturgeon, orfe, rudd, etc.) are present.

Is delivery free?

We offer free delivery on the majority of our products over £50. This excludes live fish and bespoke filters. Delivery to UK mainland addresses is £3.95 as standard, or £6.95 for express.

How do I return a product?
Get in touch via email or phone and let us know your problem, we will then help as much as possible. A postage address will be given for you to return the product back to us, and postage will be refunded where applicable to our terms and conditions, which are in line with consumer rights.

At Steel City Koi, we offer a wide range of safe and secure payment options when shopping with us.

Accepted payment methods:

Debit/Credit Cards (Inc American Express)

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Cash upon collection *only for live fish

Pay Later options currently include Klarna and Clearpay