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Product Reviews
5493 reviews on 1118 products!
ProductsWater CareBiological Starters
DrTim's One and Only Nitrifying Bacteria
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Product Description:
DrTim's One and Only Nitrifying BacteriaThe key to setting up a successful aquarium is to quickly convert the fish waste to a non-toxic form. This is done by nitrifying bacteria. Under normal conditions it can take 30 to 45 days for these bacteria to become naturally established in a newly set-up aquarium. Unfortunately, during this time period, ammonia and nitrite can increase to levels toxic to fish - a common problem called New Tank Syndrome. Our nitrifying bacteria are the result of the latest scientific research and are used by public aquariums and professionals around the world to control ammonia and nitrite.

Good for 6 months at room temperature, 1 year at 50F (10C).
Keep refrigerated for longest shelf life.
Product Specifications:
Sizes Available: 2oz, 4oz, 8oz, 16oz, 32oz, 64oz and 128oz bottles

Dosing: The entire bottle of One and Only should be added to your aquarium for the fastest, safest results.
However, the minimum dose is 10 ml of per 10 gallons of aquarium water.
One and Only cannot be overdosed.
Sponsor's Website:
User Ratings: (11 reviews)
Overall: 8.77
Value/Cost: 8.36
Effectiveness: 8.82
Quality: 9.00
Ease of use: 8.91
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Found: 11 reviews Page  1 
jonathantc08 has used this product for 1-3 Months.
Overall Rating: 8.5/10 December 26, 2012
"Skeptical... But Not Any More!"
First off if you haven't read the information on Dr. Tim's website drtimsaquatics.com I suggest you do so. Watch his videos too. This product allowed me after just 3 weeks to add 34 1-2 inch mbuna to a 90 gallon aquarium. My fish have been in the tank now for a month and I have not seen anything above 0 for nitrite or ammonia and I test daily. If you do not use a quality ammonium chloride solution such as the ammonium chloride sold by Dr. Tim, you are doomed from the start. Avoid anything from the supermarket. Use the recommended dose of One and Only for the size tank you are cycling and I can honestly tell you after some horrid tank cyclings that I've done, when I used One and Only it was the first time I cycled a tank with no problems and without killing fish. If you need any help with the product PM me because I'd gladly help.
GinaS has used this product for 0-1 Month.
Overall Rating: 10/10 August 21, 2012
"Frustrated no more!"
I was using Danios to help cycle my tank. I started loosing them and was very frustrated. I decided to use the One and Only product and in about 3 days 0 ammo 0 nitrite and 10 nitrate the rest of the fish are now happy and healthy. Will use it on future tanks.
xander22 has used this product for 1-3 Months.
Overall Rating: 10/10 July 1, 2012
"It really does work, buy this stuff!!!"
I had my Cichlid Mbuna take for about 3 weeks and my ammonia levels were over 8.0 ppm. I had lost a couple of fish and was discouraged that the ammo blockers I had been adding were slowing down my Nitrite Cycle. I added 4 oz into my 55g and waited. Concerned I called Dr Tim's support line and was amazed that I received a call back from Dr Tim himself. He spent about 30 minutes with me one the phone was very helpfull and told me what to expect. Since my ammonia level was off the charts he explaiend that it may take longer to cycle. After two days of very little change I was getting frustrated with my tank and thinking of giving up...On day three I noticed my Nitrite level strated to rise over 1.0 ppm. I went on vacation and came back 5 days later and my tank was completely cycled. 0.0ppm Ammonia and 0.0ppm Nitrite. This product doe's work and Dr Tim's customer service is the best I have ever seen from any retailer not only in aquatics. I have dumped the other products and now only use DR. Tim's additives...seems very natural and did exactlly what it should!! Dr. Tim rocks!!!!!!!!!
702Cichlid has used this product for 3-12 Months.
Overall Rating: 9.75/10 June 17, 2012
"Dr Tim's Works"
Having used this product twice now to cycle two large tanks from scratch using a fishless method to handle 2-3ppm ammonia in a 24 hour period in less than two weeks, I know this product works and it works fast. The part that pushes Dr. Tim's over the top is their customer service. Dr. Tim has a sub forum in his sponsor forums just for questions about your fishless cycle (what an incredible free resource that is, and you know I used it).

So what's not to love, you've got a great, effective product that comes with direct customer service of the guy in the industry that basically was the trailblazer for the bacteria-in-a-bottle product. You've also got multiple sizes and shipping options.

If you have any questions and want any further feedback, don't hesitate to PM me.
Iggy Newcastle has used this product for 0-1 Month.
Overall Rating: 9.75/10 May 29, 2012
"Does what it's supposed to"
After cycling a 125 for 2 weeks with .25 ppm ammonia, was advised to use this product. 2 days after adding it, my ammo was 0, nitrite 0, and nitrate 10-20 ppm. It does what it's advertised to do. Plain and simple. This was my first aquarium, so I didn't have access to a sponge/gravel.
Iggy Newcastle has used this product for 0-1 Month.
Overall Rating: 9.75/10 May 28, 2012
"Does what it's supposed to"
After cycling a 125 for 2 weeks with .25 ppm ammonia, was advised to use this product. 2 days after adding it, my ammo was 0, nitrite 0, and nitrate 10-20 ppm. It does what it's advertised to do. Plain and simple. This was my first aquarium, so I didn't have access to a sponge/gravel.
robertlewisca has used this product for 1-3 Months.
Overall Rating: 0.75/10 May 24, 2012
"Be Cautious!"
The product did not work. I followed directions to the letter, and even offered to provide all data to mfr., however instead of asking for that data, they just blamed me. I tested daily for ammonia, nitrites and/or PH, and kept my water parameters directly in line with the guidance for fishless cycling provided on their website, provided this information to the mfr., and they still blamed me. So, just be cautious. Please PM me and I'm happy to provide any further detail you desire.
ridley25 has used this product for 0-1 Month.
Overall Rating: 9/10 March 10, 2012
"Two words: it worked"
I dumped a bottle of Dr. Tim's approved for a 240 gallon tank into my uncycled 125 gallon two days before my fishes' arrival.
On the day I introduced the fish I supplemented with used media filter plus a seeded Emperor 280 HOB.
My tank showed .25 ammonia for two days before all levels (ammonia, nitrite and nitrate) hit zero. The bio-load was approx 60 mbuna sized .75 to 1.5 inches.
A few days later I was showing slight nitrates - cycle complete!
John27 has used this product for 0-1 Month.
Overall Rating: 9.5/10 August 3, 2010
"It works!"
A product like this, works or it doesn't. Dr Tims DOES, and his service is PHENOMENAL! He personally assisted me pre and post sale and is active on this forum. In addition, the product instantly cycled my tank, what more could you ask for?
hollyfish2000 has used this product for 0-1 Month.
Overall Rating: 9.5/10 November 27, 2009
"Good stuff!"
I had great results in the past with Bio Spira and recently had reason to try Dr. Tim's. I ultimately used three bottles in two different tanks. Twice, it made a huge, positive difference. In one case, it got rid of nitrite readings overnight. However, one bottle did not seem effective. It had been ordered via online (rather than my LFS, where I got the other two bottles). It failed to work and I suspect the bacteria had not survived for some reason. Now I have two bottles from the LFS as "back ups" should I ever had a biological failure in an established tank.
ifellicantgetup has used this product for 1-3 Months.
Overall Rating: 10/10 March 23, 2009
"Cycle your tank in less than a week!"
As a newbie I know nothing, Dr. Tim walked me through the process and using OneAndOnly my tank was cycled in less than a week.

GREAT STUFF! Use it, it works. Customer service is above and beyond, the product works, this is what you are looking for. This product takes the worry and hassle out of cycling your aquarium. I am sold on this product.
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Ratings are submitted by Cichlid-Forum users based upon their own subjective views and do not necessarily reflect the opinions of Cichlid-Forum.com. CF disclaims any responsibility for the accuracy of information contained in reviews submitted by users, or for any damage or liability arising from the content of any review appearing on Cichlid-Forum.com. All product information on this site, including descriptions and specifications, is based soley on information made available by manufacturers. CF disclaims any responsibility for this information or the products listed. Product information may be inaccurate and is subject to change without notice. You should confirm all information before relying on it by contacting either the manufacturer or vendor with any questions about the products or the information presented.






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