Algae Control Pond Block

Use 1 block per 1,000 liters of water

Draadalgen bestrijden? Maak heel eenvoudig uw vijver binnen 10 dagen (draad) algen vrij met behulp van het Pond Block. Het blok zorgt ervoor dat de algen in uw vijver sterven en u weer een heldere vijver krijgt.
Gebruik 1 blok per 1.000 liter water. Voor optimaal resultaat: combineer met Bacta Clear (vijverbacteriën). Pond Block verwijdert algen, Bacta Clear voorkomt ze en zorgt voor betere groei van waterplanten.


Price incl. VAT, excl.GoGreen shipping from 4.95
In stock, in house within 2 working days.

Organically grown
GoGreen Shipping
Sustainably Certified
Recycled Packaging
  • Organically grown and sustainably shipped
  • Customers give us a 4.5/5
  • Delivered from our own family nursery since 1986
  • Buy now, pay later with Klarna
  • 100% growth and flowering guarantee

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Controlling Thread Algae with Pond Block

Pond Block consists of a biological binder that dissolves very gradually in your pond. When the algae come into contact with the released substance, they will die and sink to the bottom. As a result, the water will become clear again. Complete dissolution of your Pond Block takes several months, allowing the active ingredients to enter your pond water slowly and dosed. Evaporation of your pond water and/or rainfall will not reduce the effect of the Pond Block. Since algae grows throughout the year, the Pond Block can also be used in winter. For cleaning up the dead algae on the bottom, it is best to use Bacta Clear(pond bacteria).

Algae control agent Pond Block use

  • Use per 1000 liters of water 1 Pond Block.
  • In smaller ponds of less than 1000 liters is the use in proportion (eg ½ Pond Block on 500 liters of water);
  • Precise dosing is important for best results. The Pond Blocks are best scattered in the water, in small ponds in the middle;
  • Put the Pond Blocks not in the deepest part of the pond, by the lower water temperature there will be less algae growth;
  • Preferably do not place near a pump or fountain.
  • Pond Block is good to use in combination with Bacta Clear (pond bacteria).
  • If stored dry can remain good for years
  • Additional Information

    Weight 0,1 g
    Dimensions 4 × 3 cm


    What are the shipping costs?
    Country Shipping costs
    Delivery time working days
    Netherlands €4,95 1-2
    Belgium €6,95 1-2
    Luxembourg €6,95 1-2
    Germany €6,95 1-2
    Austria €14,95 2-3
    Europe €29,95 3-5
    United Kingdom (UK) X X
    When will I receive my order?

    The average delivery time is 1 to 2 business days, if the items are in stock. Articles that are not in stock take a little longer to deliver. We do everything we can to meet the promised delivery time. If this is unexpectedly not possible, we will inform you. After your order you will receive a track & trace code. Keep an eye on this code for the most current information.

    By whom will the delivery be carried out?

    We work together with the delivery service DHL. As soon as your order leaves our house, you will receive a track and trace code so you can follow your package. The DHL will attempt to deliver the parcel on the specified dispatch date. You are not at home? Then the deliveryman will try to deliver the parcel at the neighbours. If this also fails, the parcel is taken to the nearest DHL service point. Here it will stay for 5 days for you to pick it up. DHL will always leave a note behind with instructions. Also via the track & trace code you can see where you can pick up the package.

    How can I track my order?

    After placing your order you will receive a track & trace code (DHL). Through this code you can find the most current status of your order.

    Do you have a question?

    Find your answer quickly and easily on our customer service page.

    How can I pay?

    Whatever payment method you choose, you always pay safely.

    • iDEAL: for anyone with a Dutch bank card.
    • Credit card: the amount is reserved and not debited until the item is delivered.
    • PayPal: secure online payment through your own PayPal account.
    • Bancontact / Mister Cash: online payment method via your own internet banking environment.
    • Klarna: pay your order only after you have received the item.
    Where can I find my invoice?

    After your order you will receive an invoice by e-mail.

    We also store your invoice online in your account. This way you can easily consult and print your invoices as often as you like.

    Will I receive an invoice with my order?

    No, we never send an invoice with the order itself. So if the order is a gift, feel free to send it directly to the recipient. The invoice will be sent to the e-mail address we have on record.

    Do you have a question?

    Find your answer quickly and easily on our customer service page.

    Do I have a guarantee on my plants?

    Our plants are grown with the utmost care. Special attention is paid to the development and growth of the plant. When packing your order, a quality control also takes place. So you can be sure that the plants you buy from us are in perfect health.

    Have you received plants and are you not sure of the quality? Let us know within 48 hours after delivery, using this form. Please include a photo so we can take a look and advise you. If it turns out that the plants are really not of good quality, we will of course give you a guarantee on your purchase.

    Other articles

    For all other (non-living) items you buy from us, the legal warranty applies. Legal guarantee means that a product is or should be what the consumer may reasonably expect from it. For some products there is also a manufacturer's warranty.

    How long is the warranty valid?

    If it appears that you are entitled to the growth and bloom guarantee it is valid for 1 year from the date of purchase.

    What is my warranty certificate?

    Your invoice or proof of purchase is also your guarantee certificate. You can save your invoice in your account. That way you will never lose it again. Handy, right?

    Do you have a question?

    Find your answer quickly and easily on our customer service page.

    CSR: Corporate Social Responsibility

    Van der Velde Waterplanten strives to achieve the 17 global goals. We believe that together we can make a difference. Cooperation is essential for progress. We are committed to helping people distanced from the labour market. We spare the environment by not using chemical pesticides, if necessary we use biological control. Plastic is avoided and recycled as much as possible. By following the developments in the field of packaging we have an increasing percentage of biodegradable packaging available.

    Sustainable MPS certified

    Acting honestly and openly, ensuring transparency, reliability and clarity. Ensuring a healthier and better world. This is what Van der Velde Waterplanten stands for. We would like to underline this with the MPS-Florimarkt TraceCert and Global G.A.P. GGN Floriculture certification we have obtained.

    Organic cultivation

    All of our plants are organically fertilized at the nursery and grown without pesticides. After this the plants are put into rest (hibernation). This means that the plants only start their growth process when they are placed in the pond.

    FSC paper and recycled plastic

    We strive to produce our products and packaging as co2 neutral as possible. We use PLA and PET plastic packaging and FSC certified paper.

    GoGreen Climate Neutral Shipping

    Through our partner DHL, we ship all our packages under the so-called GoGreen Climate Neutral service. With this service, DHL calculates the CO2 emissions per shipment and compensates them by investing in environmentally friendly projects.

    Do you have a question?

    Find your answer quickly and easily on our customer service page.

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