Description
Quantum AR Phosphate Remover 250ml — Lanthanum Phosphate Binder for Small Reef and Marine Aquariums
Granular phosphate media works slowly and needs a reactor; lanthanum works in hours and needs only a bottle. Quantum AR Phosphate Remover 250ml (SKU: QA150250) is a solution of purified lanthanum in deionised water that binds ionic and chemically bound phosphate and precipitates it, so the filter removes what the algae would otherwise have eaten. The 250 mL bottle is dosed in millilitres per 100 L and suits reefs and fish-only tanks up to a couple of hundred litres, across LPS, mixed, SPS, NPS and FOWLR systems.
The dosing table runs on the phosphate reading, from 0.1 to 1.0 mL per 100 L daily at 0.03 to 0.25 ppm up to 10 mL per 100 L above 10 ppm, with the middle rows listed in the details below. The solution is added directly into high water flow and is compatible with dosing pumps. Quantum’s overdose signal is a fine white film forming on the glass, which means the dose should come down, and the product is not to be used in aquariums containing live plants. Regular testing keeps the dose in step with the falling level.
Usage & Application
When to Use
- Small reefs and marine tanks: Systems of roughly 100 to 250 L with phosphate above where the keeper wants it.
- Algae control: Bringing phosphate down when hair or film algae has taken hold.
- Replacing a phosphate reactor: Tanks without room for a media reactor.
- Reef or fish-only: Rated for LPS, mixed, SPS, NPS and FOWLR aquariums, provided there are no live plants.
Dosing & Administration Guide
- Measure phosphate: Pick the row in the table and begin at the lower figure for that range.
- High-flow addition: Pour the daily amount into strong circulation, or run it on a dosing pump.
- Check for film: A fine white haze on the glass is the overdose signal; reduce the dose.
- Step down with the reading: Retest often and move to a lower row as phosphate drops; never use with live plants.
Product Specifications & Highlights
Key Features
- Fast-acting lanthanum: Precipitates phosphate rather than adsorbing it slowly, so a reading moves within days rather than weeks.
- Handles bound phosphate: Removes chemically bound as well as ionic phosphate.
- Five-row dosing table: From 0.1 mL to 10 mL per 100 L depending on the reading.
- Pump-compatible: Suitable for automated daily dosing once the rate for the tank is known.
- Visible overdose check: White film on the glass means back off.
Product Details
- Brand: Quantum (Reef Essential range)
- SKU: QA150250
- Barcode (GTIN/UPC): 680569650528
- Product Type: Additives & Supplements > Phosphate Remover
- Net Volume: 250 mL
- Contents: Deionised water, purified lanthanum
- Dose Rate: 0.1–1.0, 0.5–2.5, 1.0–5.0, 5.0–10.0 or 10.0 mL per 100 L daily for phosphate of 0.03–0.25, 0.25–1.0, 1.0–5.0, 5.0–10.0 or 10+ ppm
- Application: Directly into high water flow
- Dosing Pump: Suitable
- Caution: White film on glass indicates overdosing; not for aquariums with live plants
- Target Environment: LPS, mixed, SPS, NPS and FOWLR aquariums


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