- Sku: 3520042
- Vendor: ATI
ATI Essential Daily Traces
ATI Essential Daily Traces add a concentrated trace-element supply for reef tanks with higher demand: dense coral stocking, large refugiums, or heavy filtration with GFO, zeolite and activated carbon. ATI developed them using its ICP Ultimate MS (mass spectrometry) data so elements needed in the microgram and nanogram range don't become a bottleneck. #A and #B are sold separately and designed to be used together.
What's in each part
| #A Trace Metals | Chromium, cobalt, iron, copper, manganese, nickel and zinc. Supports photosynthesis, nitrogen fixation and the enzyme pathways behind coral pigment and tissue growth. Reference element: zinc. |
| #B Halogens | Fluorine, iodine and selenium. Iodine supports soft tissue health and blue/purple color; selenium and fluorine support protection against oxidative stress under strong light. Reference element: iodine. |
Who it's for
- SPS-heavy tanks and systems where heavy skimming and chemical media strip trace elements quickly
- Can serve as a stand-alone trace system for soft coral tanks, or alongside a calcium reactor
- Adds to the baseline trace supply in Essentials SPS and Essentials Mixed Reef
The ATI reference-value system
Each part has a reference element that you track with an ATI lab analysis: zinc for #A and iodine for #B. If the reference element reads high, reduce that part; if it reads low, increase it. The other elements in the mix stay in their intended ratios.
Dosing
- Guideline: 0.5 to 1 mL per 100 L (26 gal) per day of each part
- ATI strongly recommends setting your dose with regular ATI ICP lab analyses
- Use #A and #B together for a complete trace-element profile
Specifications
| Brand | ATI |
| Line | Essentials |
| Sizes | #A 500 mL, #B 500 mL (sold separately) |
| Dose | 0.5 to 1 mL per 100 L per day |
| Reference elements | #A zinc, #B iodine |
| Water type | Saltwater and reef |
| UPCs | 4260216216312, 4260216216329 |
Frequently Asked Questions
Do I need both #A and #B? ATI designs them to be used together for a complete trace profile.
How do I know how much to dose? Start at the guideline and adjust using the reference element on an ATI lab analysis: zinc for #A, iodine for #B.
Can I use it with a calcium reactor? Yes. ATI lists use alongside calcium reactors and as a stand-alone trace system for soft coral tanks.
Have a question?

ATI Essential Daily Traces


