I don't want to be argumentative but these are supposed to be balls of bacteria. I have tried to find where it says they also produce ammonia. So far I've not found it. I also read where they are supposed to be added each week. I'm sorry but once a tank is fully cycled there should be no reason to continue add more bacteria. The only reason I can see for adding them weekly is to keep you buying their product. PURE Aquarium is a bacterial treatmentfor aquariums of all sizes. Inside every ball there are millionsof live bacteria and enzymes. Once added to your aquarium, the bacteria and enzymes inside each ball will start to break downthe ammoniaand nitritein your aquarium’s water. PURE Aquarium also breaks down organic waste, which is often the cause of poor water clarity. PURE Aquarium will leave your water crystal clearand healthy. Please note: PURE AQUARIUM BOMB is not intended to clear green water. An appropriate UVC is recommended to clear green water. If using PURE Aquarium for the first time or if your aquarium has clarity problems, add 5 to 10balls per 100 litres of water. When water clears, continue to use as described above.

PURE Aquarium is a bacterial treatment for aquariums of all sizes. Inside every ball there are millions of live bacteria and enzymes. Once added to your aquarium, the bacteria and enzymes inside each ball will start to break down the ammonia and nitrite in your aquarium’s water. PURE Aquarium also breaks down organic waste, which is often the cause of poor water clarity. PURE Aquarium will leave your water crystal clear and healthy. Regular use of pure aquarium will ensure that your fish live in a safe, healthy and crystal clear environment.

If using PURE Aquarium for the first time or if your aquarium has clarity problems, add 5 to 10 balls per 100 litres of water. When water clears, continue to use as described above. For a 30g you want no more than 4 4-5” discus. You will need good filtration too. Something that’s moving at least 300g an hour. I googled the Pure Aquarium crystal balls and unless I am missing it I don't see where it is releasing any ammonia. These are supposed to help supply bacteria to the tank. And are supposed to make your water crystal clear. You still need ammonia to feed that bacteria. I’m very impressed. I never thought I’d be saying that about a bacterial product, but the science is sound, the product makes realistic claims, and in the flesh it has positive effects. Good effort, Evolution Aqua!

If so, you need PURE Aquariumfrom Evolution Aqua, the bacterial treatment that helps to achieveand maintaina healthy aquarium environment. However, in a healthy tank with plenty of autotrophs, a controlled addition of heterotrophs can be beneficial, especially where organic wastes need to be consumed. Add too many, though, and you’ll witness spikes of ammonia and nitrite as beneficial bacteria are outcompeted for food. Helps (with your filter) to prevent the build up of toxic ammonia and nitrites - Improves water quality for the health of your fishIt's perfectly normal for cycling to take this longer, and it will probably take another few weeks. So, onto the good news, it DOES look like you're cycling your tank and you shouldn't need to start dosing Ammonia; as the balls will be doing exactly that. We recommend that you use PURE Aquariumas part of your regular maintenance programme. You cannot overdose with PURE Aquarium. In new tanks heterotrophs will outcompete autotrophs for vital resources. While a typical filter autotroph divides around every 15-20 hours, heterotrophs can do so every 20 minutes. In the time it takes for one autotroph division you could have more than 30 trillion heterotrophs in the tank — taking up valuable space, oxygen and food. The balls are, in effect, grown in an activated sludge. Formed from a hygroscopic polymer, each ball absorbs a mixture of fluid and bacteria, layering up until it has a complement of heterotrophic and autotrophic bacteria. It’s a well-understood process and allows for nitrifiers and heterotrophs to co-exist.