Red Sea Reef Colours Pro Multi Testing Kit
Water type
Saltwater (Reef)
Red Sea Reef Colours Pro Multi Testing Kit
The three colour elements, tested in one kit before you dose. The Red Sea Reef Colours Pro Multi Test Kit measures iodine, potassium and iron — the trace elements behind Red Sea's Trace-Colors coral colouration program. Trace elements have a narrower safe range than calcium or magnesium, so Red Sea's own guidance is to test before every dose rather than follow a fixed schedule. This kit is what makes that possible without buying three separate test kits.
Key features
- Three parameters, one kit — iodine, potassium and iron, each with its own dedicated test method.
- Colorimetric and titration methods — iodine and iron are read by colour comparator, potassium by titration.
- Pairs directly with dosing — each result maps to a specific Trace-Colors supplement (A for iodine, B for potassium, C for iron).
- 40 to 50 tests per parameter — potassium's titration reagent is the limiting factor at 40 full tests; see Specifications for the breakdown.
Specifications
| Parameter | Number of tests | Range | Accuracy | Method |
|---|---|---|---|---|
| Iodine (I2) | 50 | 0–0.09 ppm | ±0.03 ppm | Colorimetric |
| Potassium (K) | 40 | 150–450 ppm | ±12 ppm | Titration |
| Iron (Fe) | 45 | 0–0.09 ppm | ±0.05 ppm | Colorimetric |
Cost per test
At $159.50 for the kit, a full three-parameter test cycle (iodine, potassium and iron together) costs approximately $3.99 per test, based on the 40-test potassium reagent — the parameter that runs out first. The iodine and iron reagents will outlast it; refill reagents let you keep testing those two after potassium reagent is used up.
What to do when a reading is out of range
| Reading | Correct with |
|---|---|
| Iodine low | Red Sea Reef Care Iodine+ Trace Colours A |
| Potassium low | Red Sea Reef Care Potassium+ Trace Coral B |
| Iron low | Red Sea Reef Care Iron+ Trace Colours C |
Suitable for, and not suitable for
- Suitable for: reef aquariums running or considering the Trace-Colors A/B/C/D coral colouration program, and anyone wanting to confirm trace element levels before dosing.
- Not suitable for: freshwater aquariums, or as a general water quality kit — it doesn't test calcium, alkalinity, magnesium, ammonia, nitrite or nitrate. Pair it with the Reef Foundation Pro kit for those.
Care and maintenance
Store reagents away from direct sunlight at room temperature, and keep bottle caps tightly closed between uses to prevent contamination. Check the use-by date printed on each reagent bottle before testing, and replace individual reagents as they run out rather than the whole kit.
Goes well with
- Red Sea Reef Care Potassium+ Trace Coral B — corrects a low potassium reading from this kit.
- Red Sea Reef Care Iodine+ Trace Colours A — corrects a low iodine reading.
- Red Sea Reef Foundation Pro Multi Testing Kit — tests calcium, alkalinity and magnesium alongside this kit's trace elements.
Warranty and delivery
Covered by Red Sea's standard consumer guarantee in addition to your rights under Australian Consumer Law. Ships standard courier — no cold chain or special handling required.
Common questions
Why does the kit list a different number of tests for each parameter?
Each parameter uses its own reagent, consumed at a different rate per test. Potassium's titration method uses more reagent per test than the colorimetric methods for iodine and iron, so its 40-test count is the practical limit on how many full three-parameter cycles the kit supports.
Do I need this kit if I only dose one Trace-Colors element?
You only need to test the elements you're dosing. If you're running the full four-part Trace-Colors program (A, B, C and D), this kit covers the three that have direct tests — iodine, potassium and iron.
Can I buy replacement reagents instead of a new kit?
Yes — individual reagent refills are available so you don't need to replace the comparator or titration equipment once a single reagent runs out.
How is this different from the Reef Foundation Pro kit?
Reef Colours Pro tests the trace colour elements — iodine, potassium and iron. Reef Foundation Pro tests the major skeletal elements — calcium, alkalinity and magnesium. Most reef keepers running a full dosing program use both.
Is titration harder to use than a colour comparator?
It takes a little more care — you're counting drops to a colour-change endpoint rather than matching a colour card — but it's the standard method for measuring potassium accurately at reef-relevant concentrations.
