Colombo – Algisin

Blanket weed can quickly smother waterfalls, pipework and pond walls. Colombo Algisin is formulated to combat string algae (blanket weed), helping you restore a clean, balanced look to your pond.

Left unchecked, blanket weed traps debris, restricts flow and makes maintenance harder. Treating early keeps your system running freely and your pond looking its best.

Why use Algisin

• Targets string algae and blanket weed
• Helps keep pipework, pumps and waterfalls clear
• Supports a tidier, easier-to-manage pond
• Suitable for ornamental ponds

When to treat

• At the first signs of blanket weed growth
• During warmer months when algae spreads quickly
• When flow is reduced by algae build-up

For best results, remove as much blanket weed as possible by hand before dosing. This improves contact and reduces strain on your filter system.

Good practice & safety

• Calculate your pond volume accurately before dosing.
• Ensure good aeration during treatment.
• Do not overdose.
• Keep out of reach of children and pets.

Consistent monitoring and early treatment make blanket weed far easier to control.

1,000 ml treats a pond of 10,000 ltrs
2,500 ml treats a pond of 25,000 ltrs
5,000 ml treats a pond of 50,000 ltrs