Product overview
Red Sea KH Coralline Gro is a liquid alkalinity and trace supplement for marine tanks. Skimming and growing coralline algae pull buffers and trace ions from the water. Standard carbonate buffers alone often leave pink and purple coralline slow to spread, and nuisance hair algae can take over instead.
It combines carbonate buffers with potassium and marine traces such as iron, in ratios aimed at coralline algae on live rock and glass.
Key features
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Dual action: Carbonate alkalinity plus traces coralline crust algae need.
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Coverage: Made to speed pink and purple coralline on bare rock and glass.
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Iron and potassium: Micronutrients for red, pink, and purple calcareous algae, without the extra organics that feed hair algae.
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Liquid ions: Ready to use without converting dry salts in the tank.
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Low residue: Inorganic mix; not an organic food, so it does not add the same waste load as coral foods.
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pH and alkalinity: Formulated for gradual buffering and to limit crusting on dosing tips and pumps.
Water and system compatibility
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Water: Marine aquariums only. Not for freshwater or planted tanks.
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Systems: Fish-only with live rock (FOWLR), mixed reefs, and new tanks during cycling and rock maturation.
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Doser: Stable unrefrigerated and unstirred in a dosing container.
Dosing and instructions
Always follow dosage & directions on product packaging.
Calculate true water volume. Typical daily use per 100 litres, aiming for 8.4 dKH (3.0 meq/L):
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New tank / rock maturation: 2 ml
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Mixed reef / moderate load: 5 ml (raises alkalinity by about 0.14 dKH)
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High-demand: 10 ml, matched to carbonate uptake
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SPS-dominant: Use only while cycling and establishing rock. On a mature SPS-heavy system switch to Red Sea Foundation B (Alkalinity) so iron does not build up.
Alkalinity must stay stable. Test before large changes. A Red Sea KH/Alkalinity Pro test kit is suitable. Do not raise doses without testing.
Storage
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Bottle: Cool, dry cupboard out of direct sunlight. Do not refrigerate or freeze.
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Doser: Flush lines with RO/DI water from time to time so delivery stays accurate.
Specifications
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Brand: Red Sea
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Range: Reef Care Program (Reef Foundation / Maturation)
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Size: 500 ml
