Cycled my tank for a few weeks before adding fish. Local big box store advised water parameters are perfect and I can add in a couple of fish that day. Added 2 goldfish and within a couple days my ammonia spiked to 3ppm an everything else was at 0. Tank struggled and fish started looking depressed and sick. Ordered this filter late Saturday night, shipped Monday, arrived to my door in California on Wednesday. By Friday my ammonia was 0, my nitrites where at .5 and my nitrates where at 10ppm. Amazing how fast it worked and best part is no more dumping chemicals trying to keep the ammonia safe and kick starting the cycle(I spent more on chemicals then this filter 🤦♂️).
I added an airstone which helped reduce the bubble side and noise from the filter.
I was never skeptical at all..this is no different than a buddy giving you pre-cycled media. My nitrites were 4PPM, within 8 hours, they were down to zero after placing this sponge into the aquarium.....recommended for new tank syndrome.
Its a wonder why this type of service is not common, being they want to sell those "bacteria in a bottle" products, that absolutely do not work.
Given the size of my tank and the fish inside, I was concerned about how quickly ammonia was building up after my cycle crashed. This product worked great for me! It was NOT an INSTANT-CYCLE, but it was very reassuring to see ammonia levels reducing each day, nitrites staying at ZERO, and nitrates building back up. The tank is cycled now and though I don't love the aesthetics of the cube-shaped sponge, I'm leaving it in the tank for probably a couple of months to make sure the BB can grow on everything else, including the sponge filter that I would actually like to use. I highly recommend this for speeding up a cycle and for saving the lives of your fish!
I ordered a small filter for a 10 gallon and after 24 hours my tank is fully cycled. Been testing for the last several days and have 0 ammonia/nitrites with fish in the tank. And this was after the filter was in shipping for 3 days. Am so relieved as I’m tired of doing numerous water changes with a fish in cycle. Highly recommend and will be purchasing in the future.
This will be my third order of an active sponge filter as I am getting back into the hobby after a cross country move and want to properly cycle my tanks as quickly as possible. Never used a sponge filter before now and I have to say I'm hooked! These are great for my angel babies and guppy breeders. I just like the versatility. Wish the tubes were clear and not green but that's an easy peasy fix, and is in no way a detriment. Thank you for reeling me in!!