Halcyon Marine Reef Salt Mix by Continuum is a premium-grade synthetic sea salt formulated to match the complete inorganic profile of natural seawater. Manufactured in small batches under stringent in-house quality controls, this mix is made entirely from reagent and pharmaceutical-grade ingredients—never from desalination waste or residues.

Backed by decades of marine chemistry expertise, Halcyon delivers consistent parameters that support the health and propagation of reef organisms, particularly small polyp stony (SPS) corals. It is suitable for use in both reef and brackish water systems, with salinity adjustable to meet specific needs.

When mixed as directed, Halcyon provides a salinity of 35 ppt (1.026 g/cm³), with a stable pH of 8.3, alkalinity of 7.5 dKH, calcium at 415 ppm, and magnesium at 1,290 ppm—ideal conditions for sensitive reef livestock.

Key Features:

• Formulated to replicate full seawater inorganic chemistry
• Pharmaceutical and reagent-grade ingredients only
• Consistent calcium, magnesium, alkalinity, and pH levels
• Manufactured in-house with tight quality control
• Ideal for SPS corals and sensitive reef species

This salt mix is a reliable choice for aquarists demanding high-quality, stable seawater conditions for coral growth and overall reef health.

Specifications:

• Salinity: 35 ppt (1.026 g/cm³, temperature corrected)
• Alkalinity: 2.7 meq/L (7.5 dKH)
• pH: 8.3
• Calcium: 415 ppm
• Magnesium: 1,290 ppm

Aquacadabra acts as credit broker/intermediary and not as a lender.

Klarna's credit products are provided by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority. More information can be found here.

Newpay finance options are provided through Deko’s platform by NewDay. P.D. Aquatics Ltd, t/a Aquacadabra is an Introducer Appointed Representative of Pay4Later Ltd, t/a Deko, which is authorised and regulated by the Financial Conduct Authority (ref no 728646) and is a credit broker, not a lender. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (ref no 690292) and is authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 for the provision of payment services (ref no 555318). More information can be found by clicking the newpay option above, or in the Newpay FAQs.

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us(stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.