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Pond Maintenance

Keep your pond clear and healthy all year round with natural maintenance.

PONDCARE
BACTACLEAR
Bloom Boost
Pond nets
Aqua Bites
Simon van der Velde

A pond stays clear if you maintain its balance, even if the water looks great right now. With a little preventive maintenance, you can keep algae from taking over, and your pond will stay healthy and clear all year round.

Simon van der VeldePond specialist and aquatic plant grower

Get started with POND CARE

Key pond maintenance tasks by season

Avies Pond substrate Plant Filter

Spring: Pond start-up

(March – May)

Give your pond a strong start to the new season.
In the spring, bring your pond back to life with beneficial bacteria, clean pond substrate, and perhaps some additional oxygenating plants. This will help everything grow well and prevent algae problems right from the start.

Algae Control the Summer

Summer: Controlling Algae

(June–August)

Green water or thread algae? Here’s how to quickly restore clarity to your pond.
In the summer, algae grow faster than your plants, especially in warm weather. With the right bacteria and enough oxygenating plants, you can restore balance to your pond without using chemicals.

Preparing Your Pond for Winter in the Fall

Fall: Preparing for Winter

(September–November)

Prepare your pond for winter and start next year off on the right foot.
With a clean bottom and plenty of beneficial bacteria, plants and fish will overwinter better. This way, you’ll avoid having to deal with algae or sludge in the spring.

Pond consultation with Bertold: Algae after 1 year—is that normal?

Simon is visiting Bertold. He built the pond entirely on his own using the *Pond Guide*. After one year: clear water, good structure, but algae. Exactly what you’d expect. A pond needs two to three years to reach equilibrium.

Clear water + algae = no problem. Your pond is still stabilizing.

In this video: What a pond looks like after 1 year Why algae are normal What you should do—and, more importantly, what you shouldn't do

Practical tip: Remove algae with a square net and add POND CARE twice a year. Not enough oxygenating plants? Restore the balance with oxygenating plants:

Learn more about algae by clicking here.

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Would you like some more helpful tips for a healthy and clear pond?

In *Simons Pond book you Pond book spot common mistakes and discover exactly how to properly construct and plant your pond. It includes a simple planting plan that you can use right away.

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Spend €20 and receive a €20 gift card with your order.

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Save at least €200 on a small pond and thousands of euros on a large pond.

Frequently Asked Questions About Pond Maintenance

Pond Advice

Pond plants actually take care of this on their own. If you do want to prune them, only do so in the spring (March–May).
Never in the winter: leave the brown leaves alone; they protect the growing core from frost.

I’d rather not. A pond lined with plastic sheeting should have a layer of substrate on the bottom.
This purifies the water, retains nutrients, and provides a habitat for beneficial bacteria that break down sludge.
Vacuuming actually disrupts that balance. You should only vacuum a swimming pond that doesn’t have a substrate.

Yes, that’s no problem at all. You can add our bacteria year-round.
They remain active at temperatures above 5 degrees and are completely safe for people, plants, and animals.
You can’t overdose on them either—we thought that was important, since our dogs drink from the pond themselves.