Red Sea Salt Blue Bucket – 55 Gallon Marine & Reef Salt Mix
$44.99
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Red Sea Salt Blue Bucket – 55 Gallon
Create stable, balanced seawater for your marine or reef aquarium with Red Sea Salt Blue Bucket, a premium marine salt mix formulated to provide the foundation and trace elements needed for healthy saltwater systems.
Red Sea Salt is designed around the parameters of natural tropical seawater with moderately elevated and balanced levels of calcium, magnesium, and alkalinity. It is an excellent choice for reef aquariums, SPS and LPS systems, marine fish tanks, and aquarists who prefer maintaining alkalinity around natural seawater levels.
This is Red Sea Salt Blue Bucket, not the higher-alkalinity Coral Pro formula.
Balanced Marine Water Parameters
When mixed with RO/DI water to 35 ppt / approximately 1.025 specific gravity, Red Sea specifies:
Calcium: 415–445 ppm
Magnesium: 1,240–1,320 ppm
Alkalinity: 7.5–8.5 dKH
Potassium: 375–405 ppm
The prepared seawater provides a pH of approximately 8.2–8.5.
Why Choose Red Sea Salt?
Red Sea Salt provides biologically balanced levels of the major foundation elements along with a full complement of trace elements.
The formula contains no nitrate or phosphate algae nutrients, no chemical binders, and no toxic levels of heavy metals. Red Sea also highlights its low moisture content and natural sourcing.
Blue Bucket vs. Coral Pro
Red Sea Blue Bucket is the moderate-alkalinity formula, making it ideal for reef keepers who want parameters closer to natural seawater or who manage supplementation separately.
Red Sea Coral Pro uses elevated foundation elements and higher alkalinity for systems where accelerated coral growth is the goal.
For established reefs, SPS-dominant systems, low-nutrient systems, and aquarists who dose calcium and alkalinity separately, Blue Bucket can be an excellent choice.
Product Highlights
Makes approximately 55 gallons / 210 liters
15.4 lb bucket
Moderate alkalinity around 8 dKH
Balanced calcium and magnesium
Full complement of trace elements
No nitrates or phosphates
No chemical binders
Designed for marine and reef aquariums
Reusable bucket packaging
Red Sea confirms the 7 kg / 15.4 lb bucket produces approximately 210 liters or 55 gallons of seawater.
Ideal For
Mixed reef aquariums
SPS and LPS systems
Low nutrient reef systems
Marine fish aquariums
FOWLR systems
Nano reefs
Established reef aquariums
Routine water changes
Mixing & Use
Mix with clean freshwater, preferably RO/DI water, according to Red Sea's instructions and the desired salinity.
Always verify salinity before adding newly prepared seawater to your aquarium and appropriately match the temperature and salinity of the new water to your aquarium.
Never add dry sea salt directly to an aquarium containing livestock.
Why Buy From Infinity and Beyond Aquatics?
Infinity and Beyond Aquatics offers trusted saltwater and reef aquarium supplies, including premium sea salt mixes, water testing, supplements, filtration, dosing equipment, pumps, lighting, and aquarium maintenance essentials.
Whether you're maintaining your first saltwater aquarium or an advanced reef system, we're here to help you find the right products for your setup.