When to use:
When establishing a new filter, adding new fish to a pond or at the beginning of the season to help kick start the filter after winter dormancy or medicinal treatment. Use Mature if ammonia or nitrite are above zero or after cleaning the filter. Can be used weekly to maintain a natural unfiltered pond.
Note: We have recently reformulated this product and the new formulation is a different colour (dark brown). If you regularly purchase this product and notice it's now a different colour, this is why!
For common frequently asked questions, click here.
250ml, 500ml & 1 Litre
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.
I know my system's measurements and want to:Calculate my volume
* 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.