POND BLOCK
Choose your option
• Algae control: 1 tablet per 1,000 L
• Free of thread algae in 10 days
• Recommendation: use in combination with Bacta Clear
9,95
Price includes VAT, excludingshipping costs
- Shipped the next business day, Shipped choose your own delivery date
Others bought this for their pond
Simons Pond Advice
• Get a €20 gift after purchase
• Choose your language: NL, DE, FR EN
• From installation to maintenance
Advantage
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
Advantage
Complete Native Pond Kit3.000
• Makes your pond maintenance-free
• 132 plants + supplies
• Installation:1 to100
Clear pond water without a pump or filter?
Make your pond clear and low-maintenance with our 6-step plan.
Simon's advice
Complete maintenance without testing or measuring. Just add it, and it works. The water stays clear all year round without chemicals, because you prevent problems instead of having to deal with them later.
Current product
Suggestion
POND BLOCK
• Algae control: 1 tablet per 1,000 L
• Free of thread algae in 10 days
• Recommendation: use in combination with Bacta Clear
Advantage
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
- Description
Description
Pond Specialist & Aquatic Plant Grower
You can easily and quickly control thread algae by adding Pond Block to your pond water. Pond Block is an algae control product that can be added to your pond year-round and ensures that your algae problem is resolved within 10 days. For best results, dose Pond Block according to the instructions on the package. 
Simon van der Velde
Pond Block: Eliminate thread algae in 10 days
About this product
Tackle thread algae easily with Pond Block! This product dissolves gradually and tackles algae without any hassle. Drop a block into the pond, and it works for months. Rain or evaporation? No problem—Pond Block keeps doing its job. Plus, you can even use it in the winter. Clear water without the headache.
What makes this product special
Pond Block isn't just any old algae killer. This smart tablet dissolves slowly, keeping your pond clean for a long time. It's designed so you don't have to worry about it. Use it year-round for constant protection against algae.
Quality and origin
With Pond Block, you’re choosing a clean and healthy pond environment. It’s safe for your pond and has a minimal environmental impact. Quality that keeps working, block by block. Good for your pond, good for the planet.
Practical Information
Pond Block is super easy to use. One block is enough for a 1,000-liter pond. Smaller pond? Just cut the block in half. For best results, don’t place it too deep or too far from the pumps. If stored in a dry place, it will last for years. Clear pond? Check. Easy maintenance? Double check.
Here's what our customers have to say!
Excellent 
817 reviews on 
Lina Berger
The water is finally clear
Purchased: Native Pond Kit 1,500–3,000 L
No matter what I tried, the water in my pond just wouldn't clear up. After exchanging a few emails, I decided to order this complete kit, though to be honest, I wasn't very confident it would work.
The delivery was in good condition and the plants looked healthy. Not much changed during the first few weeks, but after about a month, the water slowly began to clear up.
Now the pond is really in perfect balance. The plants are growing well, and I can even see frogs among the leaves again. I'm really glad I gave this a try.
Patrick Müller
Plants are growing much better now, and the water is crystal clear
Purchased: STEP ONE Pond substrate
Last year, I had a landscaper install a plant filter in my swimming pond, and he recommended lava rock and some plants from the local garden center. Unfortunately, it all went wrong; the plants died one by one, and I ended up with an algae infestation.
After contacting vdvelde, I was advised to replace the lava rock with Pond substrate to order some additional plants. Now, a few months later, the plants are growing well, and my filter is finally free of algae.
Fenna Schmidt
My little city pond
Purchased: Pond Kit Red 100-400L
I’d been dreaming of having a small pond in my city garden for a while, but it always seemed like such a hassle. I found a complete kit online and decided to take a chance, even though I was skeptical about the quality of plants sent by mail. But to my surprise, everything arrived neatly and securely packaged. In no time at all, I had set up my little pond. To my delight, I saw the first water lily bloom after just two months, and as the icing on the cake, I discovered salamanders in my pond. No idea how they got there, but it just makes it even more fun. Truly a joy!
Susi Werner
A must-have for anyone with a pond (big or small)
Purchased: Simons Pond Advice
This book has completely met my expectations. It’s a fantastic guide full of great tips on pond construction, pond plants, and design.
I highly recommend buying this.
Great book!
Jules Chabot
Blue lily: beautiful!
Purchased: Blue Water Lily
Thank you very much for the generous shipment of the marsh irisIris blue”.
The new plants have been planted, and I'm curious to see if they'll bloom this year.
There’s good news about theBlue queenwater lily: It blooms in blue here too—and it’s absolutely stunning!
Bart Timmermans
Removing floor debris without a vacuum cleaner
Purchased: POND CARE Maintenance Kit
After years of accumulation caused by fish, a significant amount of silt had built up in my pond.
At first, I was thinking about getting a pond vacuum, but after talking to customer service, I decided to go with the bottom debris removal kit. I was skeptical, especially since the water got cloudy during the first week. But after a month, the sludge has decreased significantly. No hassle with a vacuum, and a great result!
I’m a fan.
Johanna Brink
Water lilies greater biodiversity
Purchased: Native Water Lily Field XL
As plant lovers, we were looking for a sustainable addition to our project. The Water lilies vdvelde turned out to be just what we were looking for. Planting the lilies was also a lot of fun. We had requested different varieties, and that wasn’t a problem at all. The delivery was handled professionally, and everything looked great. Within a week, we already saw leaves emerging above the water, and now several flowers are blooming.
Both we and our client are extremely pleased with the result.
Raphaël Blanchard
Oxygen-producing plants save my fish
Purchased: Oxygenating Plants Package 1,500–3,000 L
My fish were gasping for air, so I looked for an air pump. Then I read that oxygenating plants could solve this problem too. I ordered the package that fits my pond, and now my fish are swimming around carefree again. An added bonus: my pond water is much clearer. Happy fish, happy me!
Greta Schultze
I'm really happy with my little pond
Purchased: Pond Kit Red 25-90L
This handy kit helped me set up my mini pond in no time. It comes with everything you need!
The service and advice were excellent—much better than at the garden center, where nobody really knows anything.
Maria Maes
From maintenance to an organic swimming pond
Purchased: Plant Filter Package 8–12 m²
I was tired of constantly cleaning the pump, so I decided to convert my pond into a natural swimming pond. With the plant filter kit from vdvelde.com, it turned out perfectly! Now I enjoy a beautiful, natural filter and lovely swimming water.