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.

Shipping

This product ships using our Medium Shipping rate due to its size and weight.

Orders typically process within 1–3 business days. Tracking information will be provided once your order ships.

Products in the same order may arrive in separate shipments depending on availability and fulfillment location.