EXTREME WEATHER WARNING: These are Live Nitrifying Bacteria, therefore, we do not recommend ordering if your weather currently exceeds 105F or drops below freezing in your area. Thank you for understanding.
Treat aquarium nitrite and ammonia levels, instantly!
Use One & Only when setting up a new tank, after a water change, cleaning your filter, when adding new fish and after a disease treatment to control ammonia and nitrite.
The 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 process called New Tank Syndrome. For years, it was assumed that two particular species of nitrifying bacteria were responsible for this process but original scientific research by Dr. Timothy Hovanec showed this not to be the case. This is one reason why nitrification products have failed to work in the past.
One & Only Live Nitrifying Bacteria are the result of the latest scientific research and are used by public aquariums and professionals around the world.
Dr. Tim`s Aquatics is the merging of the twin passions of the founder: fishkeeping and science. They make setting up and maintaining an aquarium easy by sharing practical advice and proven products developed through years of experience and their own real science.
Their products are developed with a simple goal – to make fishkeeping easy. You don`t need to be a biologist or chemist - they`ve got that covered! You don`t have to make mistakes – they`ve made hundreds so you can learn from them. Just have a little patience. There`s no magic or secrets – they`ve done the research and produced the products.
Dr. Tim has published numerous peer-reviewed scientific papers on nitrifying bacteria and filtration for aquariums and aquatic life-support systems. He also has written dozens of articles and columns for aquarium trade and hobby magazines. He has been an invited speaker to many national and international conferences and regularly speaks to aquarium societies.
Dr. Tim hold numerous patents for nitrifying bacteria, their use to accelerate nitrification in aquatic systems and their detection using molecular methods.
Most orders under $29 ship for only $2.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in 1-7 business days after it ships out.
We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in 1-7 business days. Just spend $29 or more!
Over 90% of shoppers receive their orders within 2 business using UPS Ground. Upgrade from free economy shipping to UPS Ground for only $2.99—or spend $250 and we’ll upgrade you automatically!
Expedited shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.
Same-day shipping is available Monday-Friday for most products—place your order by 10:30 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.
We ship live plants, live foods, and frozen foods within the contiguous United States. Each of these categories is subject to its own $19.99 flat-rate shipping fee to cover the special packaging and/or expedited shipping costs required to ensure safe delivery. Orders with 12+ live plants ship free!
Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.
A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.
Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.
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