Overview
Phosph8 is a clean, highly soluble inorganic phosphate supplement designed to correct ultra-low PO₄ and stabilize nutrient balance in modern reef aquariums. Maintaining a small, consistent phosphate level supports zooxanthellae metabolism, coral coloration, polyp extension, and a healthier microbial community—especially in ULNS systems with heavy export (skimmer, refugium, GAC/GFO).
Key Features
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Ultra-pure, reef-safe phosphate—mixes clear with no dyes or perfumes
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Fine control for micro-adjustments; ideal for SPS-dominant systems
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Helps prevent “zeroed nutrients” issues (pale tissue, stalled growth, nuisance dinos tied to starvation)
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Plays nicely with carbon dosing and trace programs when used as directed
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Two sizes for nano to large systems (60 mL dropper, 355 mL bottle)
Directions & Dosing
Always test PO₄ before and 30–60 minutes after dosing. Typical mixed-reef targets: ~0.02–0.08 ppm (tune for your system).
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Start low: Add 1 drop (~0.05 mL) per 25 gal (95 L), wait, and re-test.
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Creep to target: Repeat small additions until your target is reached.
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Stabilize: Maintain with daily micro-doses based on your tank’s consumption rather than large, infrequent additions.
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Application: Dose into a high-flow area or sump; avoid simultaneous dosing with high-pH additives—separate by 5–10 minutes.
Pro tips
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If using GFO or other PO₄ binders, reduce/temporarily remove while raising PO₄; media can instantly strip additions.
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Do not use alongside lanthanum chloride flocculants.
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If PO₄ overshoots, pause dosing and rely on export/water changes until you’re back in range.
Compatibility
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Safe for corals, clams, and reef-safe fishes when used as directed.
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Compatible with Ca/Alk/Mg regimens, bacterial supplements, and carbon dosing (monitor your NO₃:PO₄ balance).
Ingredients
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Ultra-pure inorganic phosphate in purified water.
Storage & Handling
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Store at room temperature, away from light. Do not freeze.
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Shake gently before use. Keep out of reach of children and pets.
Product Specifications
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Product: Captiv8 Reef BluePrint – Phosph8
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Function: Raises/maintains phosphate (PO₄³⁻)
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Format: Liquid
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Sizes: 60 mL dropper bottle; 355 mL bottle