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Cloverleaf Pre-Vent Blanketweed 2kg (5500gals)

Original price £42.99 - Original price £42.99
Original price
£42.99 - £42.99
Current price £42.99
Pre-Vent is a special recipe that attempts to succeed where many commercial bacteria cultures fall short.
All pond fish, plants, and biological filtration systems are safe to use with Pre-Vent.

Pre-Vent should be used approximately every 10–14 days to help equalise your pond.
to help stop the tenacious blanketweed from coming back.


Per 266 gallons, add 10g (1207L).
Use the enclosed scoop to
800 gallons about per scoop (3632L).
Without causing any negative effects, the dosage can be changed as needed.
We advise starting a dose approximately 10–14 days after using Cloverleaf Blanket Answer.

Pre-Vent should be introduced to the pond by mixing with enough pond water and then spreading evenly across the pond's surface.
The pond will appear slightly foggy, but it will normally clear up in a few hours.

Use water that is over 10 degrees Celsius for optimal results.

Sturgeon, orfe, rudd, and other river-type fish require high amounts of pond saturation oxygen to survive.

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:

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Cash upon collection *only for live fish

Pay Later options currently include Klarna and Clearpay