Water type
Saltwater
Red Sea Phosphate Pro Reagent Refill Kit
Restock the chemistry, not the comparator. This is the genuine Red Sea reagent refill for the Phosphate Pro test kit — the same 0–5 ppm PO4 chemistry at ±0.02 ppm accuracy, without paying for a new comparator block and vials you already own.
Key features
- 100 tests — restores the full test count of a Phosphate Pro kit
- Same accuracy as the full kit — 0–5 ppm PO4 at ±0.02 ppm
- Fresh, in-date reagents — aged reagents drift and give false-low or false-high readings
- Lower cost than a full kit — no comparator or vials included, because you don't need them again
Specifications
| Compatible with | Red Sea Phosphate Pro Testing Kit |
|---|---|
| Tests per refill | 100 |
| Measurement range | 0–5 ppm PO4 |
| Accuracy | ±0.02 ppm PO4 |
| Water type | Saltwater (reef) |
What's included
- Reagents for 100 tests
This refill does not include the comparator block or viewer — it restocks chemistry only.
Suitable for, and not suitable for
- Suitable for existing owners of the Red Sea Phosphate Pro comparator kit
- Not suitable as a standalone test kit — you need the original comparator to read results
Goes well with
- Red Sea Phosphate Pro Testing Kit — the full kit, if you don't already own the comparator
Warranty and delivery
Reagents carry a use-by date printed on the pack. Consumer guarantees apply under Australian Consumer Law in addition to any manufacturer terms. Standard parcel delivery applies.
Common questions
Will this work with my existing Phosphate Pro kit?
Yes — it's the genuine Red Sea refill and restores the same 100-test chemistry the full kit ships with.
Does this include a new comparator?
No. It's reagents only. Keep using your existing comparator block and viewer.
How do I know when to reorder?
Check the use-by date on the reagents and reorder before it passes — expired reagents give unreliable readings.
Is this the same chemistry as a brand-new kit?
Yes — same 0–5 ppm range and ±0.02 ppm accuracy as the full Phosphate Pro kit.




