Fritz Aquatics FritzZyme 7 Live Nitrifying Bacteria Naturally Removes Amonia & Nitrite for Freshwater Fish (32-Ounce)
Original price was: $22.99.$19.99Current price is: $19.99.
Price: $22.99 - $19.99
(as of Nov 01, 2025 01:18:22 UTC – Details)
FritzZyme 7 contains specific strains of live nitrifying bacteria proven to reduce fish loss due to toxic levels of ammonia and nitrite. Nitrifying bacteria can take weeks to naturally establish colonies in new aquariums while ammonia and nitrite can reach lethal levels in only a few days. FritzZyme 7 provides the proper balance of bacteria proven to rapidly seed biofilters, greatly reducing the natural cycle time allowing for safe, immediate addition of livestock. Fritz Industries was the first company to pioneer commercial-scale cultivation of nitrifying bacteria and has remained one of only a few in the world with continuous production for over 30 years. FritzZyme 7 may be added to new tanks or established systems any time the biofilter needs fortification including: after water changes, aggressive cleaning, adding new livestock, medicating or changing filter media. FritzZyme 7 contains live freshwater-specific species of nitrifying bacteria.
Product Dimensions : 0.02 x 0.02 x 0.02 inches; 0.3 ounces
Item model number : 80210
Date First Available : March 2, 2012
Manufacturer : Fritz Aquatics
ASIN : B0002DGKBI
Best Sellers Rank: #6,911 in Pet Supplies (See Top 100 in Pet Supplies) #39 in Aquarium Water Treatments
Customer Reviews: 4.6 4.6 out of 5 stars 3,283 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
🐟 Live Nitrifying Bacteria for Rapid Cycle: FritzZyme 7 Freshwater contains live, species-specific strains of nitrifying bacteria, proven to quickly reduce toxic ammonia and nitrite levels, significantly reducing fish loss and cycle time in new and established aquariums.
🌊 Versatile and Easy-to-Use: Ideal for use in both fresh and brackish water systems, FritzZyme 7 is perfect for post-maintenance applications, after water changes, aggressive cleaning, adding new livestock, or when changing filter media, ensuring a stable and healthy aquatic environment.
🙌 No Refrigeration Needed with One Year Shelf Life: This product is uniquely buffered for long-term stability, eliminating the need for refrigeration and offering a convenient one-year shelf life, making it a hassle-free solution for aquarium maintenance.
⭐ Proven Success in Aquatic Care: With over 30 years of continuous production and development, Fritz Aquatics is a leader in the industry, delivering the highest quality, viable nitrifying bacteria. This product represents years of proven success in professional and home aquariums alike.
❤️ Benefits Beyond Cycling: FritzZyme 7 not only accelerates the establishment of biofilters in new tanks but is also essential in reinforcing the biofilter after any system disturbance, ensuring ongoing stability and health for your aquatic pets.
Customers say
Customers find the water treatment effective, with one noting it worked within 16 hours and another highlighting its suitability for heavily populated tanks. Moreover, the product receives positive feedback for its quality, with one customer specifically recommending it for new and cycled aquariums. However, ammonia levels show mixed results – while some report immediate zero levels, others struggle to get them down to zero. Similarly, bacteria viability and tank cycle speed receive mixed reviews, with some customers reporting quick cycles while others experience dead bacteria. Additionally, customers disagree on the product’s value for money, with some finding it a great value while others consider it a waste of money. Moreover, the smell receives negative feedback, with several customers reporting a horrible rotten smell.
10 reviews for Fritz Aquatics FritzZyme 7 Live Nitrifying Bacteria Naturally Removes Amonia & Nitrite for Freshwater Fish (32-Ounce)
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Original price was: $22.99.$19.99Current price is: $19.99.
Rev. Marvel –
I’m impressed! Don’t wait on getting this product!
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.
LS Shopper –
Keeping numbers in positive zones
So far Iâm very pleased! My tank is 7 years in the running and well stocked with fish and plants for 40 gal set up.. long lived stock with several species of tetras, cory cats, rasboras, and neons (oldest corydora is 7 years old) and a few nerites to keep things tidy.. So far the careful introduction to their water has been positive. Very nicely keeping parameters in good zones.
Dill –
Contains no ammonia / UPDATE
My concern were the reviews that said it had âammoniaâ. 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 ârotten eggsâ is a byproduct of bacteria âsulfurâ – so itâs 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, donât 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.
Saul C. –
KEEPS YOUR BENEFICIAL BACTERIA GOING!
Amazing product!!! Helps keep tanks cycled when doing massive water changes or when cleaning out canister filters so you don’t lose all of your beneficial bacteria! Recommend this product to all my fish keepers!
Human on the Bell Curve –
Some things to consider based on my treatment in 22L
So much contradictory and bad information out there. Here’s what I could conclude that seem consistent from various sources.The parasites are thought to be released in the water column at night. I read this after a stubborn case that was responding slowly. I changed application to evening and things were cleared up in two days.I did 24 hr interval, 30% water change, per instructions. I did it in evening. I raised temp from 76 to 79, I did not want to stress fish and plants at 86 F, sheesh. I continued for 3 days after last spots disappeared. 9 day total treatment time.I poured a dose in a white bucket and let it sit for 24 hrs. At first, water was bright blue. After 12-14 hrs it was nearly clear. Many sources claim light sensitivity. Perhaps another reason to apply at night when strength will be full and parasites are free swimming.NOTE: I don’t think you can use this with Prime. Instructions say DO NOT USE WITH SULFUR OR SULFINATE BASED CONDITIONERS. Take a whiff of Prime. Smell that rotten egg? Ya. I used API water conditioner. Good luck trying to find ingredients of fish chemicals. Very frustrating (bad bad manufacturers!).It WILL definitely stain your air lines etc. I read aquarium coops blog on this, they claim to have never seen a problem. No idea how, unless they simply do not have PVC or silicon tubing. At end of treatment, mine are bright blue.I added some salt. I did 4 gallon changes based on actual water volume (not tank size) and added half teaspoon. Just enough to deal with nitrites in case of disruption of bacteria. The ich-x is claimed by some to have mild antibiotic effect. As an aside, my fish like salt. If I didn’t have sensitive plants, I’d add it all the time. It prevents scale build up on tank, my fish thrive, etc. You don’t need as much as they say. Salt is good. Really. I am trying to find a minimum that doesn’t impact plants.Fish and plants seem ok, not 100% sure about shrimp and snails, they seem less active. I don’t like the long duration required as this stuff is very toxic, however, it works.
michael day –
Brilliant
joyce –
I emailed Fritz about some quries and their response was prompt and friendly. been using these for tanks and i do not need to add any salts or whatever. Fzz7 will stink like old eggs and a bit brownish but it is normal, not spoiled. Fritzguard is bluish and dun need it as much as Fzz7. Keep them normally in cabinet and use them every water change. Instructions are clear..
Lis –
El producto llegó caducado.
Theresa Cheong –
I tried quite a no of other bacteria for my fish tank and found this to be the most effective. Only a small amount is needed for a stabilised tank.
Fiona –
Absolutely rubbish, please donât buy thisâ¦buy gloop instead for the live bacteriaâ¦these donât work.