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ATI Essentials Pro Two-Part Supplement Concentrate Complete Set #1 & #2 (2L per bottle)


Item #: UZ8132

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Calculate your dosage of ATI Essentials Pro using ATI's Dosing Calculator—whether it's your first time dosing or you need to adjust your dosage.

ATI Essentials Pro is a super concentrated two-part system that will replenish all necessary elements that reef aquariums demand and consume, at a level on par with natural seawater.  With more than 20,000 water analyses, the information provided from those analyses has enabled ATI to improve the recipe of their Essentials recipe, bringing us the Essentials Pro.

The components needed to maintain a reef system are all present to help with the calcification and construction of new skeletal growth like: calcium, carbonate, magnesium, strontium, and barium.

ATI Essentials Pro also provides the elements for your corals metabolism and coloration, such as: boron, bromine, fluoride, potassium, cobalt, chromium, iron, iodine, lithium, manganese, molybdenum, rubidium, sulfate, vanadium, zinc etc.

Cleverly combined, no more annoying mixing of elements

The Essentials Pro is ready to dose, and does not need to be diluted.  All of the necessary elements come premixed in the two Essential Pro bottles, saving room in your storage areas around your tank.

Daily Consumption

Since no reef aquarium is alike, they all continuously consume substances from the water in order to grow.  Essentials Pro will continuously supply a ratio of supplements that typical reefs demand and consume, at an optimal level.


  • A highly concentrated formula
  • Contains all essential elements and trace elements
  • Promotes growth, coloration, and vitality of coral
  • Excellent for beginners to advanced aquarists
  • Saves space, replacing 3 x 10 liter conventional supplement supplies


  • Dosing per bottle = 10 ml per 26 gallons (100 liters)
    • Note: If calcium value changes over time, the dosage of Essentials Pro 2 should be adjusted according to calcium consumption
    • For smaller systems, diluting the two-part solutions is recommended

ATI Water Testing and Treatment

ATI’s line of water treatment products is a comprehensive care system for your aquarium. By using ATI Essentials you can work smarter—not harder—to supply all the essential elements your tank needs in one easy-to-use system.

Let ATI do the math and chemistry for you! Get complete water quality analysis with ATI Lab mail-in water testing service. Use your results as a recipe for success to fine-tune your aquarium using ATI Elements for maximum coral health and growth.

To keep your reef tank parameters stable and at ideal levels, use the ATI DP-6 Dosing Pump to automatically dispense your favorite ATI brand supplements.

Manufacturer information

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.

5 Stars


Reviewed on
December 15, 2020

Yes, I would recommend this.

One of thier best products

Pros: All you need in 2 bottles

Cons: Packaging is bad. There needs to be a plastic locked cap. The metal non sealed cap leaks and like the 3 part im missing some good stuff spilled out from bottles bouncing in shipping.

I'll be trying the 2 part for the first time. I've ran the 3 part and it works great. It really cuts down on guess work and water changes.

Was this review helpful? 1 0


Reviewed on
November 01, 2020

Yes, I would recommend this.

Best 2 Part

I have SPS and clams in my tank, have much better color and growth using this compared to TM All For Reef. Great value with it being so concentrated!

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Reviewed on
August 06, 2020

Yes, I would recommend this.

Great product

Pros: Awesome

Cons: None

A lot cheaper and lasts longer and seen better growth and coloration

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Reviewed on
July 27, 2020

Yes, I would recommend this.

Great product easy to use and it’s a great price

Pros: Water coloration and growth

Cons: None

Very affordable considering I switched from Red Sea I love how it’s equal dosing of each only takes a week to find the right dosing and the calculater for the dosing is spot on I have noticed better coloration and better growth and overall health was of the tank

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Reviewed on
July 07, 2020

Yes, I would recommend this.

Good product

This additive has caused very good coral growth.

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Reviewed on
June 12, 2020

No, I would not recommend this.

Cost benefit not there.

Pros: Quality product that easily maintains ionic balance in the reef.

Cons: No different than E.S.V. B-Ionic but twice the price.

Excellent product that does what it claims, but there is a virtually identical product that is less than half the cost. E.S.V B-Ionic also contains trace elements but is about half the cost. I tried to convert the amount I would need using data supplied by the manufacturer, and calculated I would need 50 ml per day undiluted, but in reality I required 125 ml per day compared to 250 ml per day of ESV. E.S.V is about $5.65/L, and at equal dilution this product is $10/L.

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Reviewed on
February 12, 2020

Yes, I would recommend this.


Pros: works, only need to dose two components

Cons: none

It does what it's suppose to do and I like dosing two components only

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Reviewed on
September 10, 2019

Yes, I would recommend this.

Just get it already

This stuff is amazing. Been using it over a year without water changes. Received my 1st ICP test back and was a little low on iodine after one year. Per ATI purchased iodine and dosed the recommended amount for 3 days and thats it. Did i mention i havent changed my water in over a year!!

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Reviewed on
September 06, 2019

Yes, I would recommend this.


Pros: It's concentrated and ready to dose as-is. You can dilute it. the website makes the dosing easy to titrate.

Cons: None

I like that the Magnesium, Alk, cal and trace elements are all dosed with these 2 solutions. I diluted mine and dose according to the online instructions. Its nice that the website tells you how much to dose based on your test results and how to titrate doses. Its very easy. One of my Montis started to encrust about 5 days after starting this regiment.

Was this review helpful? 1 0


Reviewed on
July 07, 2019

Yes, I would recommend this.

Favorite Supplements

I've tried other 2 or 3 parts before, and ATI has produced the best results. Dosing equal amounts is very convenient.

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