Hi there, this is a great idea and I was hoping it would work - it just didn't work for me personally. Glad I still got it to add positive materials to my tank ecosystem. It just didn't help my cycle in particular. I will however try this again the next time I cycle a new tank.
Sorry to hear that. The two biggest reasons it doesn't work for some people is if they use ammonia from a bottle instead of fish, or if they use Prime or other ammonia neutralizing product.
Don’t waste time trying to cycle your tank with other methods. This filter took care of a few of my tanks within a week. Great company to work with as well.
I cycled a 10 and a 5.5xl in four days with these filters. Both tanks have zebra danios to feed the filters. As a long time aquarist, I've learned that sometimes the easiest solution is the best...get these and then regularly do your water tests to monitor. You'll be amazed at your results. AND DEFINITELY USE FISH! Better than seeding with a little gravel from a friend's tank...these filters come from well-cared for tanks so I felt comfortable that there were no pathogens. Game changing product, Steve and company.
These filters work just great! It was my first time buying these. I didn't know you are not supposed to use Prime (to not delay the cycling process). I did use Prime in first few days and not the last 3. It took 6 days total. Will purchase again.
It works well but didn't cycle my tank completely as I'm still waiting for it to take down my nitrite. But it did near instantly get rid of my ammonia. So im hoping soon it will be ready for my fish.
One of the possible problems is that you didn't use fish to provide the ammonia. As we state on our site, bottled ammonia often doesn't work. We never recommend bottled ammonia be used.