There are many products on the market that claim to run aquariums with 'instantaneous cycles'. In my opinion, there's nothing that works out of the box, but it's close. The first thing to consider is that you need a source of ammonia for this to work. The fish will work, but it's very stressful and some find it cruel. Rotting fish food works but will leave a messy aquarium. Your best bet is to buy a good test kit and some ammonia for the aquarium. Dose the aquarium to get ammonia and add this product. You can add more than necessary. I've been doing a double dose for about a week. One for the tank and one for the filter. Keep testing ammonia. When he gets back to zero dose. What will happen is that after the ammonia has been neutralized, you will see high nitrite levels. Continue dosing ammonia every few days until nitrites and ammonia are at zero and nitrates are showing up. When this happens you get stuck. It is recommended to add ammonia without API for at least a week to be safe by checking daily. If you still don't have nitrites and ammonia along with some nitrates, you can get fish. At first, only get three or so and make sure to change the water first. Another advantage of this product is that it can be added after a water change, filter media change or fish addition. Good to have added in these times. Always have it on hand in case the aquarium breaks and you need a boost.
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