Step 6: Clear water
Pond bacteria: for clear water
Pond bacteria your pond clear and healthy. Adding them twice a year maintains the biological balance without the need for dredging.
Simon's advice
twice a year
Without bacteria, you'll run into these problems
Many pond owners have to start over after a few years—you can prevent this with bacteria
Bacteria can help prevent all kinds of problems
Spend just 10 minutes twice a year, and your pond will stay in perfect condition for decades
Silt is broken down
Bacteria break down organic matter into harmless substances. Dredging is not necessary.
Plants continue to grow
Healthy soil = healthy plants. Your plants will look better every year instead of worse.
Water that stays clear
The biological balance remains stable. The water doesn't become cloudy, and algae don't stand a chance.
Saves a lot of money
No need to hire a pond maintenance company for dredging anymore. You can easily save €1,000–€3,000 each time.
With the right bacteria, you can prevent problems instead of having to fix them years down the line. This keeps your pond in balance, so you’ll never have to start all over again.
How Pond bacteria Protect Pond bacteria Pond
An invisible army working for you day and night
Break down sludge
Bacteria consume organic matter (leaves, fish waste, dead plant parts) and break it down into harmless substances.
Remove toxic substances
They neutralize ammonia and nitrite produced by decomposition—both of which are toxic to fish.
Stabilize the water
Good bacteria keep pH, KH, and GH levels stable. The water remains balanced and clear, season after season.
Feeding your plants
Decomposed material is converted into nutrients that plants can use. Perfect recycling!
Working in winter too
At temperatures above 5°C, bacteria remain active in your pond water. They never completely stop.
Self-healing system
Once established, good bacteria multiply on their own. You simply need to reinforce the colony twice a year.
Simons Maintenance Schedule
Follow this simple guide and your pond will stay in perfect condition for decades
Spring (March–April)
Revive the bacteria after winter. Re-establish biological activity and prepare the pond for the growing season. Follow the dosage instructions on the label for your pond’s volume.
Fall (September–October)
Help the bacteria thrive before winter. They break down the leaves that fall into the pond and ensure your pond stays clean throughout the winter. This is especially important if there are many trees nearby.
Choose your maintenance package
Maintaining clear water throughout the season
Pond bacteria sludge buildup and maintain a stable balance.
Recommendation: Add twice a year (spring and fall)
Tailored to the size of your pond.
POND CARE Maintenance Kit 20,000 L
• All-in-one pond maintenance
• 100% eco-friendly: for 1,000–20,000 L
• Safe for people, plants, and animals
Order 2 packages at once (for spring + fall) and receive a free BLOOM BOOST worth €15
POND CARE Maintenance Kit 40,000 L
• All-in-one pond maintenance
• 100% eco-friendly: for 20,000–40,000 L
• Safe for people, plants, and animals
Order 2 packages at once (for spring + fall) and receive a free BLOOM BOOST worth €15
POND CARE Maintenance Kit 60,000 L
• All-in-one pond care
• 100% eco-friendly: for 40,000–60,000 L
• Safe for people, plants, and animals
Order 2 packages at once (for spring + fall) and receive a free BLOOM BOOST worth €15
POND CARE Maintenance Kit 100,000 L
• All-in-one pond care
• 100% eco-friendly: for 80,000–100,000 L
• Safe for people, plants, and animals
Order 2 packages at once (for spring + fall) and receive a free BLOOM BOOST worth €15
What others are saying
More than 10,000 pond enthusiasts have already joined
“Ourswimming pond was always cloudy and full of silt after winter. After doing some research, I added POND CARE to the plant filter in the spring. After a month and a half, the water was crystal clear, and our children and we are once again enjoying the pond to the fullest!”
— Anna Vermeulen
“After winter, there was always a layer of sludge at the bottom and the water looked terrible. I usually dredge the pond, but this time I tried POND CARE in April. Since then, the water has stayed clear and the pond looks much livelier.”
— Marie Bernard
“I don’t use a pump or filter, so the water would occasionally turn green despite my plants. I then BACTA CLEAR INSTA CLEAN and BACTA CLEAR . After three weeks, I could see the bottom of the tank and my fish and frogs again. I’m going to keep using these products.”
— Luca Ibarra
“In the spring, algae would often start growing quickly and the water would become cloudy. I used POND CARE for the first time in early March. It was easy to apply, and I didn’t have to do anything else after that. The water stayed clear, and the plants look healthier than in previous years.”
— Elena Silva
“Every spring, algae would appear as soon as the weather got warmer. I started using POND CARE in March, and the water has stayed clear ever since. Maintenance is minimal, and the fish are swimming around happily. I’m pleased with the results.”
— David Müller
Frequently Asked Questions About Pond bacteria
Simon’s rule of thumb: twice a year. Once in the spring (March–April) to kickstart biological activity, and once in the fall (September–October) to prepare the pond for winter. The bacteria will then multiply on their own.
Absolutely! Our BACTA CLEAR are 100% organic and safe for people, plants, fish, and other aquatic animals. They are even essential for a healthy ecosystem. It’s impossible to overdose—more bacteria = faster breakdown.
Bacteria need 2–4 weeks to establish themselves and become active. You’ll notice this in clearer water, less sludge, and healthier plants. It’s preventive maintenance—you prevent problems instead of fixing them after the fact. After a few years, you’ll really see the difference: no dredging needed!
Yes, definitely! Bacteria not only keep the water clear, but more importantly, they break down the sludge at the bottom. You can’t see it, but without bacteria, it builds up. After 2–3 years, your pond will be full, and you’ll have to drain it completely. By continuing to add the product as a preventive measure, you can completely avoid this.
Bacteria become active when the water temperature reaches 5°C. In the winter, their activity slows down, but they don’t stop completely. That’s why the fall application is so important—those bacteria continue to work throughout the winter, breaking down fallen leaves. In the spring, give them a boost to get them back up to full strength.
Don’t panic! Your pond won’t collapse right away. But over time, sludge will build up more quickly and the biological balance could be disrupted. Missed a dose? Just do it again next time. It’s cumulative—every year you treat the pond helps prevent problems.
All-in-One Clear Water Solution
Why buy item by item when you can get everything at once? Order the complete pond kit that’s perfect for your pond. All 6 steps in one package—ready to go right away!
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Want to become a pond expert?
You've now completed the 6 steps to creating a clear, low-maintenance pond. But did you know there's so much more to learn?
In Pond bookSimons Pond book he shares 35 years of experience from his nursery. All the mistakes people make, all the tips that work, and everything else you need to know to turn your pond into a masterpiece.