Nitrico 50 Litre Bacterial Goop Pouch


We currently have 30 available in stock.

A pouch of live Nitromonas and Nitrobacter goop ready to populate your new aquarium and filter.

We rate this pouch of bacteria to efficiently break the waste down in a tank up to 50 litre volume that is sensibly stocked. If you feel that your stocking density is high for the size of the tank, please consider purchasing a larger pouch of bacteria than you may think is necessary.

When your filter bacteria arrive, the pouch will contain trillions of live nitrifying nitrosomonas and nitrobacter bacteria. It is important that your bacteria are administered into the tank very soon after delivery and fish should be introduced at the same time as the bacteria or within 48 hours if possible. If ordering with your Tropco fish order then they will be delivered together.

Our bacteria are cultured in our state of the art, bacterial digester. They have not seen fish and there is absolutely no chance of any disease cross contamination as there would be if you moved media from one fish filter to another. Please ensure your pH is above 6.5 and your kH is not below 4 to ensure that your filter bacteria can thrive properly.

Your pouch of bacteria will come with clear and easy instructions on how to use them effectively.

The only time that any customers struggle with the use of goop is when it has been used in extremely soft water with very low KH present or used in conjunction with new soil or other active substrates. An active substrate such as soil will leach large amounts of ammonia for a number of weeks. It will also, often, absorb KH from your water. All nitrifying bacteria rely on KH to survive and thrive. Without it, your cycle and/or goop will die. If you are using a new active substrate then we advise monitoring your water for ammonia leaching and KH depletion before buying any Nitrico product. Only when your water is stable should you consider using any Nitrico bacterial product.

We do not recommend ever adding more than double dose to any aquarium as bacterial die off may cause a spike in nitrite. If you feel that you may require a higher dose, please contact us.

The size of goop pouch that we recommend for a tank is sufficient to break down the equivalent of 2ppm waste ammonia in 24 hours at 26 deg. C. Rarely is it necessary to increase this dose unless the tank is heavily stocked or there is an additional ammonia source present. If you add too much goop then you may see a nitrite spike due to bacterial die off. This does not mean that the bulk of the bacteria are dead. It just means that the number of bacteria is adjusting to the correct levels for your situation. A nitrite spike can usually be rectified quickly with a water change with dechlorinated water. Once the bacteria die off has occurred, the water chemistry should stabilise very quickly.

Nitrico goop cannot make up for an inadequate filter system or lack of flow in your tank.

Please take a look at the FAQ section on the Nitrico website as many questions are answered there.



  • by Peter H

    this stuff is amazing I cycled my tank the old way and it was fine but you hear so many stories of my tank being cycled but when I put my fish in the next day they are dead what went wrong so instead of hoping it was ok I knew from other peoples reviews that it would be great so massaged the goop in my twin sponge filter turned on the air pump and within an hour or two it was clear enough to put my lamb chop rasboras in and my pygmy corydoras


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