Soft Opening: Try our new website.


ATI Nutrition N (Nitrogen) - 500 mL


The ATI Nutrition is an advanced nutrient management system that simplifies control, naturally, with nitrogen, phosphorus and carbon: Nutrition N, Nutrition P, and Nutrition C.  Algae, cyano, and diatoms, will be held off, and there will be no need for extra equipment like media reactors, ceramic blocks, or bio-pellets when using ATI Nutrition. 

In home aquaria, nitrate and phosphate can get out of balance where either one is extremely higher than the other, resulting in slow growth, poor coloration, and even coral dying. Supplementing either ATI Nutrition N or P will help counteract this imbalance with the necessary dosing of the nutrients that reefs crave, while Nutrition C reduces any excess levels, promoting the growth of bacteria that naturally consumes the excess.

Stone corals need calcium, carbonate, magnesium, strontium and barium for development of their skeletal structures, however, for biomass construction, trace elements, organic compounds, and nutrients of carbon (C), nitrogen (N) and phosphorus (P) are needed. ATI Nutrition P enriches the supply of Essentials Pro by providing essential, organic compounds and nutrients. 

ATI Nutrition C-N-P complements the use of Essentials Pro, ideally, with organic compounds and nutrients.  It is also compatible with other traditonal 2-part dosing systems, individual supplements, or regimens.  


  • Supplements essentials pro with organic compounds and nutrients
  • Allows for precise adjustment of nutrients according to the Redfield ratio and actively prevents nutrient limitation
  • Actively increases the formation of chromoproteins in corals
  • Promotes the growth and vitality of all reef inhabitants

Basic Dosing Principles - What to Dose

Nitrate (NO3) Phosphate (PO4) Nutrition C (Carbon) Nutrition N (Nitrogen) Nutrition P (Phosphorus)
Too High Too High
Too High Too Low
Too Low Too High
Too Low Too Low 1/2 of N


Manufacturer Info

ATI is a German based company that specializes in high quality T5 lighting products as well as a line of skimmers and aquarium filter media. Their T5 bulbs and fixtures have become one of the more popular brands of reef enthusiasts.

Ask a Question Earn 15 Points when you answer a question
Sort By :
9 Questions
Displaying questions 1-9

Free, Fast, and Flexible Shipping Options

  • $5.99 flat rate shipping for orders under $39

    Most orders under $39 ship for only $5.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in up to 7 business days after it ships out.

  • free shipping for orders $39+

    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 up to 7 business days. Just spend $39 or more!

  • free faster shipping for orders $250+

    Over 90% of shoppers receive their orders within 1-2 business days. Upgrade from free economy shipping to faster shipping for only $5.99—or spend $250 and we'll upgrade you automatically!

  • need your order even faster? no problem!

    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.

  • buy it today and we'll ship it today

    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.

  • live plants, live foods, and frozen foods delivered to your door

    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!

Learn More About Shipping

60-Day Return Period with Easy Online Returns

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.

We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.

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.

Learn More About Returns

Earn 5% Cash Back for Most Purchases

Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!

  • Earn 5 reward points for every $1 you spend to get 5% cash back
    Most Products
  • Earn 1 reward point for every $1 you spend to get 1% cash back
    Abyzz, American Marine, AquaIllumination, AutoAqua, CoralVue, Digital Aquatics, EcoTech Marine, Giesemann, GHL, Hanna Instruments, Hydor, IceCap, Innovative Marine, Iwaki, Kamoer, Kessil, Klir, Korallen-Zucht, Maxspect, Mur-lok, Nano Box, Neptune Systems, NYOS, Oceanbox Designs, Pax Bellum, Radium, Red Sea, Reef Glass, Reef Octopus, Seneye, Somatic, Tunze, Vertex Aquaristik, and Waterbox Aquariums

You can also get bonus reward points by purchasing select items during special sales and promotions.

Learn More About Rewards