Bio-Recup+ | Rainwater Harvesting Tank Maintenance

Item number: 7424943096099
£19.75 £16.46 (excl. VAT)

24 in stock

  • Combats odours in rainwater tanks, rainwater wells, rainwater harvesting systems, and water butts.
  • 100% biological. The water can be used safely.
  • Specifically developed to break down organic sludge in your rainwater tank.
  • Contents: 1 pack contains 150 grams

Bio-Recup+ | Rainwater Tank Maintenance | Plastic-Free!

Eliminates odours from your rainwater well, harvesting tank & water butt.

Bio-Recup+ is a highly effective, biological product in completely plastic-free packaging. It works using non-pathogenic bacteria and micro-organisms that break down organic material in the rainwater tank without releasing unpleasant odours. This helps prevent smells from developing in the water. Because Bio-Recup+ is entirely biological and contains no biocides, the water can be safely used for tasks such as laundry, flushing toilets, and garden irrigation. The product is also suitable for use in water butts.

Additionally, the product can help reduce algae formation by removing the nutrients algae need to grow. As it doesn’t kill algae directly, some patience is required.

The packaging contains 150 grams. It’s easy to use: simply dose a few tablespoons (15 grams each) of Bio-Recup+ into your tank. The exact amount depends on the size of your system. For dosage guidelines, see the tab: User Guide.

This product is 100% biological and carries no hazard label. Naturally, keep out of reach of children.

How do I use Bio-Recup+?

The maintenance dosage is recommended during the warmer months; it’s not necessary in winter.

Does your rainwater tank produce a strong odour? Then it’s advisable to temporarily increase the dosage. This is completely safe for both the tank and the use of the water.

How to dose?

There are two ways to apply this product:

  • Directly into the tank: Spread the product evenly over the water surface.
  • Via the pipes: First mix the product with water in a separate container. Stir well (the product does not dissolve!) and then pour it into the pipes.

For rainwater tanks & rainwater wells:

Capacity Initial dose Maintenance dose every 4 weeks
Up to 5,000 litres 30 grams (2 tbsp) 15 grams (1 tbsp)
Up to 10,000 litres 30 grams (2 tbsp) 30 grams (2 tbsp)
Up to 20,000 litres 60 grams (4 tbsp) 45 grams (3 tbsp)

tbsp = level tablespoon

For water butts:

Capacity Maintenance dose every 2 weeks
0 to 200 litres 0.5 tbsp
200 to 400 litres 1 tbsp
400 to 600 litres 1.5 tbsp
600 to 800 litres 2 tbsp

What does a pack of Bio-Recup+ contain?

A pack of Bio-Recup+ contains 150 grams.

For which rainwater systems or installations is this product suitable?

Bio-Recup+ is suitable for the following systems and installations:

  • Water butts
  • Rainwater harvesting systems
  • (Underground) Rainwater tanks
  • Rainwater wells

Does Bio-Recup+ have a hazard label?

No, this product is entirely biological and contains no chemicals. Therefore, it does not require a hazard label. However, it is always wise to keep the product out of reach of children.

How much do I need for my rainwater tank?

This depends on the size of your rainwater tank or water butt. See the dosage instructions under the tab: Instructions.

Can I use Bio-Recup+ all year round?

That’s not necessary. The product is mainly recommended for the warmer months.

Does it break down all waste in my water butt?

Bio-Recup+ is designed to break down almost all organic material in the tank. However, it cannot break down sand.

Can I use the water from my tank as drinking water for animals?

Our product is not harmful or toxic, but we do not recommend using the water as drinking water, even for animals.

Customers rate us with a

9 out of 10

Helen Nevin

03/02/2026
Quick delivery and good quality product
Product: Roebic K97
Source: Google

Chris Miller

18/01/2026
Fast delivery. Product very simple to use and, so far, seems to be doing the job that it is intended to do.
Product: Roebic K97
Source: Google

Mike

05/01/2026
I spoke with Richard who was able to advise me on the best products to use. Dispatched quickly and arrived well packaged.
Product: Bio-Recup LQD
Source: Kiyoh

Be Ge

28/12/2025
I had an obvious clog between soakaway and septic tank. Completely inaccessible to a human. This solved the problem almost instantly.
Product: Roebic K570
Source: Kiyoh

John

22-12-2025
Great product, good around service, quick delivery.
Product: Roebic K570
Source: Kiyoh

Andrew

18/12/2025
New to septic tanks so was befuddled by an annoying stench. Great website was easy to understand, advice and problem solving. Purchased recommended products and it seems to be sorted. Will follow advice going forward. Reasonable price compared to other sites, purchase and delivery was seamless and quick. Grateful newbie. Cheers
Product: Roebic K57
Source: Kiyoh

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