Thread algae control
Thread algae control for crisp clear water: remove thread algae in your pond quickly and effectively!
Thread Algae Control Package - S - 100 - 1,000 L
- For 100 - 1,000 L
- Fights filamentous algae
- 100% eco: Safe for humans, plants & animals
Thread Algae Control Package - M - 1,000 to 10,000 L
- For 1,000 to 10,000 L
- Fights filamentous algae
- 100% eco: Safe for humans, plants & animals
Thread Algae Control Package - L - 1,000 - 20,000 L
- For 1,000 to 20,000 L
- Fights filamentous algae
- 100% eco: Safe for humans, plants & animals
Thread Algae Control Package - XL - 20,000 - 40,000 L
- For 20,000 to 40,000 L
- Fights filamentous algae
- 100% eco: Safe for humans, plants & animals
Control and prevent thread algae in the pond
Simon van der Velde
Thread Algae Control and Prevention Package
Thread Algae Control and Prevention Package - S - 0.5 - 1 m²
- For 0.5 - 1 m²
- Prevents and combats string algae
- Placement -1 to -20 cm
Thread algae control and prevention package - M - 1 - 2m²
- For 1 - 2 m²
- Prevents and combats thread algae
- Placement -1 to -20 cm
Thread Algae Control and Prevention Package - L - 3 - 4 m²
- For 3 - 4 m²
- Prevents and fights thread algae
- Placement -1 to -20 cm
Thread Algae Control and Prevention Package - XL - 8 - 12 m²
- For 8 - 12 m²
- 96 plants + BACTA CLEAR
- Placement -1 to -80 cm
Thread algae Control and Prevention Package - XXL - 16 - 24 m²
- For 16 - 24 m²
- 192 plants + BACTA CLEAR
- Placement -1 to -20 cm
Not sure how many gallons of water your pond holds?
This is what our customers say!
Excellent 200+ reviews at
Oxygenating plants and a bottle of Bacta clear
Purchased: Pond clear package - M
My pond was quite murky, so after a good conversation with Simon, I decided to follow the advice: more oxygen plants and a bottle of bacteria. I ordered the recommended package, but after four days no improvement was visible. Full of disappointment, I contacted customer service. They advised me to be patient and give the process 2-3 weeks. Although I had my doubts about it, I decided to wait anyway. And what turned out? After two weeks, the water started to clear and I even saw frogs that I had never noticed before! Thanks team vdvelde, and apologies for my impatience!
Plants are growing much better now and water is crystal clear
Purchased: POND SUBSTRATE pond substrate - 40 liters
Last year I had a landscaper install a plant filter at my swimming pond, recommending lava and some plants from the local garden center. Unfortunately, things went completely wrong; the plants died one by one and I suffered an algae infestation. After contacting customer service, I was advised to replace the lava with pond substrate and order some more plants. Now, several months later, the plants are growing well, and my filter is finally free of algae.
My little city pond
Purchased: Complete Pond Package - S - Red
I had been dreaming of having a pond in my urban garden for some time, but it always seemed like such a hassle. Online I found a complete package and decided to take the gamble, although I was skeptical about the quality of plants sent through the mail. But to my surprise, everything was delivered neatly and well-packaged. Within no time I had my pond set up. To my delight, after only two months I saw the first water lily bloom, and as icing on the cake I discovered salamanders in my pond. No idea how they got there, but it only adds to the joy. Truly enjoying it!
A must for anyone with a pond (large or small)
Purchased: Simons Pond Advice Book
This book completely meets my expectations. A great guide with lots of great tips on pond construction, pond plants and design.
Highly recommended purchase on my part.
Great book!
Blue lily: beautiful!
Purchased: Hardy Blue Water Lily - Nymphaea Blue Queen
Thank you very much for the generous delivery of the swamp iris "Blue Lis".
The new plants have been planted and I am curious to see if they will bloom this year.
There is good news about the water lily "Blue Queen": It is also blooming here in blue - and how beautiful!
Removing soil sludge without a vacuum cleaner
Purchased: Soil Dirt Pond Removal Package - M
After years of accumulation by fish, quite a bit of silt had accumulated in my pond.
At first I thought about a pond vacuum cleaner, but after contacting customer service I opted for the bottom debris removal package. I was skeptical, especially because the water became murky the first week. But after a month, the silt has reduced considerably. No hassle with a vacuum cleaner, and great results!
I am a fan.
water lilies for more biodiversity
As lovers of greenery, we were looking for a sustainable addition to our project. Van der Velde's water lilies were a hit! With DROP & GROW, it was really simple: plant and enjoy. We asked for different varieties and this was no problem either. Delivery was perfect. Within a week we already saw leaves above water, and meanwhile there are several flowers blooming. Both we and our customer are very enthusiastic.
Oxygen plants save my fish
Purchased: Oxygen Plants Pond Package - L
My fish were gasping for air, so I was looking for an air pump. Then I read that oxygen plants could also solve this problem. I ordered the package that fit my pond, and now my fish are swimming around carefree again. Additional plus: my pond water is much clearer. Fish happy, me happy!
Very happy with my small pond
Purchased: Complete Pond Package - XS
This handy kit helped me set up my mini pond quickly. Everything you need is included! The service and advice were top notch, much better than at the garden center where no one really knows anything.
From maintenance to an organic swimming pond
Purchased: Complete Plant Filter Package - L
I was tired of constantly cleaning the pump, so I decided to convert my pond to an organic swimming pond. With the plant filter package from vdvelde.com, it worked out perfectly! Now I enjoy a beautiful, natural filter and lovely swimming water.
Everything for a natural pond
Choose your pond and discover everything you need for a maintenance-free, self-regulating pond.
Frequently Asked Questions
Pond clarity can be affected by several factors, including the presence of algae, water quality and the balance of bacteria in the pond.
With murky water, it is important to identify the cause. This can range from algae blooms to a lack of beneficial bacteria. Plenty of oxygen plants and a bottle of Bacta Clear are the solution.
Keeping your pond algae-free is achieved by maintaining a healthy balance between pond plants, pond fish and bacteria in the pond. Using Bacta Clear helps keep algae away.
It depends on the extent of the problem and the solution used. With oxygen plants and Bacta Clear, improvement can be seen within a few weeks.
The anti-alga pond package includes 4 types of loose oxygen plants; elodea densa, hornwort, crabgrass and moss balls. These aquatic plants grow just below the water surface so they keep the sun out of the water in the summer and add oxygen to the water. The convenience of these plants is that you throw them loose in the pond and you do not have to worry about them.
Thread algae control and prevention in the pond
Are you experiencing problems with filamentous algae in your pond? We completely understand how frustrating this can be. Thread algae can quickly spoil the enjoyment of a clear, beautiful pond. We have struggled with this problem ourselves and know exactly how it feels to have to deal with that pesky algae over and over again.
We are ready to help you!
With our years of experience, we have put together the Complete Anti Algae Pond Package, specially designed to control filamentous algae naturally and effectively. This package is not only environmentally friendly, but also cost effective. No need to buy expensive chemicals that can harm the water. Instead, we offer a 100% natural solution that really works.
Controlling thread algae and floating algae
Thread algae and floating algae are two types of algae that can make ponds murky. Controlling thread algae and floating algae in the pond with lime is a common method. A more natural and effective way to make pond water clear by fighting algae is to add Bacta Clear to the water. BactaClear also stimulates the growth of aquatic plants which, together with the bacteria, restores the biological balance in the pond and keeps it healthy. One bottle of Bacta Clear is sufficient for 20,000 liters of water.
Controlling algae in your pond
There are different types of algae, including green, brown and blue algae. It can be challenging to control algae in the pond naturally, but with Bacta Clear's pond bacteria it is possible. There are also other methods to control algae in the pond, namely planting enough oxygen plants and other types of aquatic plants. Furthermore, a layer pond substrate on the bottom should not be missing.
What is filamentous algae?
Thread algae, also known as filamentous algae, is a type of algae found in ponds and other bodies of water. They are long, thin threads that stick together and form a dense layer. This can give an unsightly appearance to the pond and affect water quality. Excessive growth of filamentous and floating algae can reduce oxygen levels in the water, which can be dangerous to pond fish and other aquatic organisms in the pond. Fortunately, thread algae can be easily and quickly controlled and prevented by proper pond design.
What is the cause of filamentous algae?
Thread algae begin innocently as gossamer strands that attach to the pond edge, plants or rocks. Causes are:
- Insufficient oxygen plants: Thread algae and oxygen plants are food competitors. If there are not enough oxygen plants to absorb nutrients from the water, filamentous algae have a growth advantage.
- Low water hardness: Thread algae grow well in soft pond water, while oxygen plants do not.
- Leaf fall: Falling leaves that decay on the pond floor release nutrients that promote filamentous algae growth.
- Abundance of fish: Fish produce waste, which makes pond water more nutrient-rich and encourages the growth of filamentous algae.
Is filamentous algae good?
To a limited extent, filamentous algae can contribute to the pond ecosystem by consuming nutrients that might otherwise lead to an explosion of more harmful algae species. However, when they get the upper hand, they can interfere with other plants and disrupt the pond's biological balance.
How do you prevent filamentous algae?
- Provide enough oxygen plants: Place enough oxygen plants in the pond so that they can absorb nutrients from the water.
- Limit leaf fall: Span a net over the pond to prevent falling leaves.
- Limit the number of fish: Too many fish make the pond water more nutrient-rich.
- Remove filamentous algae by hand: This helps slow its growth.
- The ultimate answer to thread algae is a properly designed pond: A properly designed pond promotes a natural balance, with each plant and organism playing its part in creating a healthy environment. This balance keeps the water clear and prevents excessive growth of algae such as string algae.
Control of filamentous algae
The best weapon against thread algae is not a temporary solution, but is to set up the pond correctly from the beginning, below are some essential points that a correctly set up pond should meet:
- pond substrate: A healthy pond bottom is crucial. A thick layer pond substrate attracts beneficial bacteria that help purify the water and provides a stable base for plants.
- Oxygen plants: They purify the water, provide hiding places for fish and marine life, and help regulate temperature and algae growth.
- water lilies: These beautiful plants provide shade, help regulate water temperature and provide hiding places for fish.
- Marsh and aquatic plants: These plants play a crucial role in water purification and algae control.
- pond bacteria: These microorganisms are the unseen heroes of your pond, contributing to a clear and healthy ecosystem.
Tip: freshwater mussels are a great addition to a correctly designed pond, as they naturally purify pond water. One mussel purifies an average of 10 liters of water per hour.
Our step-by-step plan for a correctly set-up pond shows you step-by-step how to set up your pond correctly to prevent problems such as algae: Read our step-by-step plan.
Removing thread algae from the pond?
Is your pond already constructed and you are suffering from a filamentous algae infestation? Then try to restore the balance with good bacteria. These single-celled organisms ensure that string algae have less chance to grow. To combat filamentous algae with pond bacteria, use our in-house developed product: Bacta Clear. A product with a unique formula, consisting of two different strains of bacteria. When administering Bacta Clear, the bacteria attach themselves to the pond substrate. The enzymes secreted by the bacteria filter the water. In this way, the water in the pond returns to balance and the filamentous algae no longer have a chance to grow. By the way, most ponds are filled with tap water. Unfortunately, this does not succeed in controlling and removing string algae, because tap water contains a lot of lime and lacks the right bacteria.
Algae in the swimming pond or plant filter? Solution: place oxygen plants between the Sumpfpflanzen
Thread algae koi pond
Likewise, filamentous algae can occur in a koi pond. This is a deep pond built specifically for koi carp, in which they can overwinter well. One solution may be to feed the pond fish less, which prevents uneaten or undigested food from becoming a food source for the algae. In addition, you are more likely to have the koi carp eat the filamentous algae. A second good solution is to plant additional aquatic plants. This would specifically involve plants that filter well and add oxygen to the water. Simons best choice of plants are the Lis, great reedmace, pickerel weed and horsetail plant. Thread algae control in the koi pond is not done with one plant. Feel free to place several aquatic plants in the pond. They will grow back on their own when the koi carp have eaten from them.
What does filamentous algae look like?
What is the cause of thread algae in the pond?
Removing thread algae from the pond?
Thread algae destroyer
Take an organic approach and enjoy a clear pond without chemicals. Do our online pond check to find out how to go about it.