Its live bacteria and enzymes in a unique gel ball delivery method.

Bacteria are suspended in the ball until placed into aquarium water. When fish go in, ammonia is produced, and the bacteria leave the ball to feed on the fish waste. The ball shrinks and the bacteria coat the substrate, decoration and filter media. Other bacteria are also contained in Pure which clear water, and help reduce organic waste.

Ideally, place Pure Aquarium inside the filter, in an area that will contain it. You may need to use a filter bag to keep it in one place. Areas of water flow are best, and if you have to, you can drop Pure Aquarium straight into an aquarium containing small fish. Large fish over 15cm may try to eat it, which should be discouraged.

No, but it does contain aerobic (oxygen demanding,) bacteria, so strong surface agitation and/or aeration from an airpump and airstone is encouraged.

Yes, Pure Aquarium balls shrink down over time leaving a small 5mm bead. This can be left in the filter with other filter media, or removed and discarded.

Yes, an interesting optical illusion happens when Pure Aquarium is placed in water – it turns invisible! Pour the contents into a fish catching net and you’ll see the ball, then tip into the tank..

Pure Aquarium Bomb is best for set-up of a new aquarium and filter, and Pure Aquarium is best for regular addition and long term maintenance. Adding Pure aquarium into long established aquariums should see the water getting clearer and appearing more polished, within 24 hours..

Yes it is possible for a large fish to eat Pure. It is only gel and friendly bacteria, but it should be discouraged. For any fish that is large enough to ingest Pure Aquarium, either in its hydrated or shrunken form, place it into the filter and contain it.

As soon as Pure Aquarium is placed into an aquarium with fish, and dechlorinated water of the correct temperature, something will happen. Bacteria will leave the ball in their millions and seed the aquarium. You can’t see them but they are there and working, and Pure’s bacteria has been independently tested and counted. The least visible difference will be on a mature, healthy, well filtered aquarium with already crystal clear water, but even then solid waste levels may be lessened in the tank and inside the filter. The most difference and benefit will be seen in dirty, poorly filtered tanks, with water clarity and quality issues.