NT Labs
Diagnosis Tool Dosage Calculator Stockist Finder


From £9.49


Algae & Blanketweed Control

Restricts growth of algae and blanketweed by filtering out UV light using a cool blue dye.


Available in the following variations:

250ml, 500ml & 1 Litre

Stockist Finder

Simplified map of the United Kingdom.

Find your nearest NT Labs Authorised Retailer.


Let us calculate your dosage for you!

To make the process of using our products even easier this handy dosage calculator tells you the amount you will need to put into your system. Please ensure you also read the instructions and warnings that are written on the bottle/pack label.

I know my system's measurements and want to:

Calculate my volume
Dosage calculator

Calculate dosage

You’ll require*
0 ml

* Always follow the instructions on the label. This calculator is intended to be used only as a guide to how much product you need to buy to treat your system. It does not take account of displacement caused by gravel, rocks and ornaments etc and does not include the volume of any external filtration system. NT Laboratories Ltd. will not accept any responsibility for inaccuracies or misuse of this guide.

Send us your product review


  • Tony from Reading

    Used this after dosing my pond with Magiclear to take away some of the suspended particles and this has kept my Pond free from Algae for 2 months, very impressed.