An all-natural product that releases massive amounts of beneficial bacteria into aquarium.
16 oz. (500 ml) bottle treats up to 945 U.S. gallons.
Hagen Nutrafin - Cycle Biological Aquarium Supplement
This product is certainly no bio-spira. These biological supplement products such as Cycle or Stress Zyme do not contain the actual bacteria needed to begin an aquarium cycle. The actual bacteria come from the product bio-spira. Cycle claims to contain the current strand of bacteria, but it doesn't. It's only a primer, kind of like how you should prime something before painting it. Some people say their cycles takes weeks to months to finish. I've always used Cycle and my tank finishes cycling in about 2-3 weeks. The bottle says to supplement with a small weekly dose. Instead I dump the whole bottle in at the beginning and never purchase another bottle for that fish tank. So although this product does not give you instant cycling, it does speed up the process, in my experience anyway.
Cycle is the most effective in its league, because it prevents fish loss by means of benefical bacteria. To prolong the shelf life and ensure product effectiveness, the benefical bacteria in the bottle is inactive, kinda like a dormant stage. When Cycle is released into your aquarium, the benefical bacteria begins colonizing and reproducing. This ages the tank rapidly, and shortens the time to begin safely adding fish. Cycle can also be used as a weekly maintenance for saltwater or freshwater aquariums. Hope this helps!
I have been using Nutrafin Cycle for about a year now, and I am very very happy with the results! I originally purchased it to start cycling a new tank, and it worked great! I haven't lost any fish since I have been using this product. Highly recommended.
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