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Pond - Barley Straw Pellets

Algae stopperz 2

Algae Stopperz

Pesticide-free natural algae control, no mess, no trouble, no blanketweed or algae.

  • Simply sprinkle around the edge of the pond margins where Algae-Stopperz will sink and start working (in around 2 weeks) to create the ideal conditions for fish and plants alike.
  • Alternatively, place in a pond planting basket or net and leave on margin/ledge or in waterfall where water can flow through.
  • Works in either natural or filtered ponds.
  • Repeat every 2 months with full amount for your pond until control is effective, then add 1/3 of dose monthly.
  • Safe to add regularly - cannot overdose.
  • For complete blanket weed control ensure Algae-Stopperz are added throughout autumn and winter to ensure activity from the outset of spring.
  • Alternatively, clean out strong growing blanket weed in summer and allow activity of Algae-Stopperz to start preventing re-growth.
  • Inhibits duckweed in ponds with water flow.
  • Free from pesticides.

For common frequently asked questions, click here.



Available in the following variations:

2.5 Litre

Where to Buy?

Simplified map of the United Kingdom.


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.

Note: This calculator does not take into account water displacement such as that caused by substrate, ornaments, water features and plants etc. Therefore, please adjust the calculated volume accordingly.

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Dosage calculator

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* 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.