I was recommended this filter by a friend when I was starting to cycle my first axolotl tank. It had my tank (A 29 gallon) cycled in 1-2 days. I recommend this product to anyone and everyone.
I got 2 large filters for my 50 gal tank and it was the best thing I could have done. The tank was cycled within days of getting them. I'm about to order atleast 3 more big ones and 1 small one. I was a little confused when I had to set it up but it's really easy once you get what your doing. I couldnt be more happy with my filters and I'll definitely be back for more.
Like many I had little luck with some of the bacteria in a bottle products. TSS was hopeless and I lost fish in the process. I then switched to a fishless cycle using ammonia and Stability. The entire process was still excruciatingly slow - it took 14 days to see any real nitrates but frustratingly I was still seeing some ammonia, albeit no nitrites.
Upon receiving the filter (which was excellently packaged), I performed a 90% water change and added 10 white cloud minnows to my planted tank. 24 hours later I dropped the filter in the tank. I was relieved to see ZERO ammonia and nitrite readouts each day and by day 12 I was registering >5ppm nitrates. That's a fully cycled tank in my mind. All the while the fish have been fine.
A few folks talk about the filter cycling their tanks in mere hours or a couple of days. I'm not sure what criteria is used to determine their tanks as cycled. Every tank is going to be different. My 20 long is moderately planted, and it took a few days to start seeing nitrates emerge.
I listened to pet store employee and stocked my tank without cycling it. Ammonia spiked and I lost a couple of fish. Somebody from aquarium community suggested this and it lowered bmy Ammonia in a couple of days along with few water changes. Thanks a lot !
As a new angelfish breeder, I've bought several of these and they have almost all cycled my tanks within a day or two. If you need an aquarium up and running quickly, I highly recommend buying one or more of these. I will definitely be back if I ever need to set up another