Fritz Aquatics FritzZyme 7 Live Nitrifying Bacteria Naturally Removes Amonia & Nitrite for Freshwater Fish (1-Gallon)

This is my first time using this product. The reviews spoke highly of this company. I started with ghost feeding the first week, but wasn't getting as much ammonia as I wanted to begin the cycle. I got the ammonia that goes along with this bacteria in a bottle. Got the ammonia up to 4ppm 2 nights ago. Yesterday, this bottle came in, and I dosed it as recommended. This morning I did my tank parameter testing with the API Master Kit. In my cycling tank it read 2.0ppm ammonia, 0 nitrites, and 5.0ppm nitrates! It just skipped right over nitrites! That tells me this product is VERY effective! Considering it's taken me months to cycle other tanks, this is mind blowing to me. I'm glad I listened to experienced folks that using high quality ammonia and live nitrifying bacteria is FAR superior to ghost feeding. I purchased the smallest bottles they have, and I'll still have nearly all of it! Well, I guess that means I'm just going to have to get more aquariums, ha! It's so easy I'm still processing this. Don't sleep on these products, the value far exceeds their price! I'm also glad this can be used as a maintenance for established tanks. It will be a great product to have on hand to maintain a well functioning cycle.

I tried two other products and followed results with an API master test kit. I started a freshwater 55gal tank and began a fishless cycle (with API tap water conditioner), however I wanted to speed up the process with a starter product.I first tried Petco's Imagitarium Biological Booster product at the recommended starter dose. After one week using Dr. Tim's ammonia to start the cycle I was at 2ppm ammonia, 0ppm nitrite and 0ppm nitrate. I tried a second starter dose, again after a week (now 2 total weeks in) I was at 2ppm ammonia, still 0ppm nitrite and 0ppm nitrate.Second, I tried API's Quick Start product at the beginning of week 3. At the end of week 3, you guessed it, 2ppm ammonia, 0ppm nitrite, 0ppm nitrate. I did not attempt a second dose of API Quick Start. I was beginning to lose faith in the idea of "quick start products".After being frustrated by the previous two, I gave FritzZyme 7 a shot based on positive YouTube review content. I added the full 16oz bottle to my 55gal tank. The very next day I began to see trace nitrite readings (well under .25, most likely .125 or so). Within two days after that I saw ammonia begin to recede, and nitrite to continue to rise by about .125 daily until it hit .5ppm nitrite by the end of day 4. By the end of the week (now 4 total weeks in) I have 0ppm ammonia, barely traceable amount of nitrite and 5-7.5ppm of nitrate!This product works, and works fast. It is no more expensive than the others at the box stores. Don't waste your money on those, buy this and get a cycled tank faster!

My concern were the reviews that said it had “ammonia”. However, most tap water has ammonia, mine does. So I cannot test this product using tap water. Or else it would give a false positive result. Also, the smell of “rotten eggs” is a byproduct of bacteria “sulfur” - so it’s normal to smell this.For the test. I used a sample of water from an established tank that already has 0 ammonia and added FritzZyme 7 to it. Using the API ammonia liquid test, results are FritzZyme 7 does NOT contain ammonia.Looking forward to how this works on my tanks that need a fortification of BB.UPDATE: 1 week later, decided to use it on a newer tank to test its full potential and it cycled (day 1: 5/28/25 and today 6/3 final results)! Amazing! Tip, if doing IN-Fish cycle, make sure to watch any spikes in ammonia, nitrite, nirate, or PH daily. If needed do small WC, don’t mess with the substrate or filter when doing so, and let the cycle do its thing to keep your fish safe. Trust the process. This product did what it said it would do. Using it now to fortify my other tanks.

This is the best product out there to cycle a new tank or for increased ammonia. I learned from experience wasting my money on the rest. Everything else is garbage. Start a new tank with the turbo version and use the regular for established tank spikes. The results are amazing.