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Product Description

A video showing the correct set up of a canister filter, placement of RP Ammonia Block pods and use of booster filters can be found here

RP Aquatics Ammonia Block round pods are a unique aquatic resin manufactured by RP Aquatics which are suitable for Coldwater, Tropical and Marine systems. The pods allow the filter to mature naturally as long as they are used in the correct place (last in the system) - therefore they will not starve the bacteria and delay cycling like liquid ammonia blockers will do (e.g. some commonly available water conditioners with binding agents to reduce ammonia, nitrite and nitrate).
After the filter matures there is no need to continue use of pods assuming that the filter is suitably sized, properly set up and fully mature (0 ammonia, 0 nitrite and 0 nitrate).

Round shape allows for free water flow around through the resin as long as they are used flat. The round shape is perfect for use in a booster filter if the booster is used after the main canister. 

The premium grade ammonia removal resin works best in a canister filter (or booster) but can be used in other filters with the same great results.

Each pack contains 3 x 100g pods which is enough for up to 800 litres (210 US gallons) of water. Each pod is approx. 12cm (5") diameter.


RP Ammonia Block eradicates poisonous ammonia much faster than all other ammonia pads available from other manufacturers and that is why we stock these.

New aquariums can be stocked immediately without the fear of experiencing an ammonia spike which would otherwise kill the fish. Likewise, the pods can be added before you go on holiday to prevent any ammonia spikes from over feeding.
Simply add the recommended amount of pods to your filter and allow the filter to mature naturally over the next 12 weeks (useful life of the pods).


- Safe start for any aquarium.
- Removes and prevents any ammonia spikes.
- Gives peace of mind while on holiday.
- Can be used for up to 12 weeks.
- Can be used to rapidly set up an emergency quarantine tank.
- Can be used in conjunction with RP Nitrate Remover.


- Remove the pods while using fish treatments just as you would with carbon or other 'chemical' types of media.
- For badly neglected tanks with inadequate or dirty filtration (rescue scenario) it is recommended to give the filter a good cleaning and make sure the tank is also well cleaned using a gravel cleaner to remove any uneaten food and fish waste from the substrate. Then it will be suitable to add the pods to the filter.
- Suitable for Coldwater, Tropical and Marine systems.


- For use in canister filters and larger internal filters (e.g. Juwel). Also suitable for overhead filters and larger HOB aquarium filters as long as the filter is large enough.
- RP Ammonia Block must be used FLAT and not squashed into the filter. That will ensure good water flow through the pod and will maximise exposure to ammonia laden water.
- The positioning of the pods in a filter is critical for proper function as he bacteria living in the filter can be starved if they are used in the wrong place - always place the pod(s) LAST in the filter system to allow the bacteria to get exposed to the available ammonia first.
- When used with the RP Nitrate Remover the RP Ammonia Block must be placed BEFORE the Nitrate Remover. That will ensure maximum benefit.


1 pod for 0-200 litres (0-53 US gallons)
2 pods for 200-500 litres (53-132 US gallons)
3 pods for 500-800 litres (132-211 US gallons)

Typical case study for Ammonia Block can be found here



Customer Reviews

Ammonia Block (3 x Ammonia removing pods)

Removes ammonia from water.