Concentrated Strontium Supplement for All Marine Fish & Reef Aquaria
- Highly-concentrated ionic strontium solution.
- Incorporated by corals, clams, and other reef-building invertebrates into aragonite, the mineral that is secreted as skeletal material.
- Stronger than most competing strontium solutions.
- Contains no unwanted organic material such as EDTA, gluconate, or polygluconate.
- Over 50% stronger than most competing products.
- Free of phosphate, silicate, and organic material.
- Formulated by a marine scientist.
Strontium is found in the bones of fish and, more importantly, in aragonite, the mineral secreted by reef-building marine invertebrates such as corals, clams, tube worms, and their respective allies. Overall, strontium accounts for between 0.75 - 1.00% of aragonite’s total mass, and findings suggest that strontium itself induces inorganic precipitation of other ions, creating abiogenic aragonite. Rapid growth rates of corals and other reef-building invertebrates witnessed when strontium is maintained at the natural seawater concentration of approximately 8 ppm suggest this element’s importance in the marine environment. The rate at which strontium is extracted from the water is determined by the stocking density of reef-building livestock, type of lighting, and other biological, physical, and chemical conditions; therefore, each aquarium will have different requirements for the rate of strontium supplementation. Once the rate of strontium uptake in the aquarium has been determined, the proper dosing rate of this product can be easily calculated. It is recommended that a quality salt mix with the proper (not augmented) alkalinity and concentrations of major, minor, and trace elements be used to establish natural seawater parameters in the reef aquarium, providing a stable ionic foundation on which to build.
The basis of healthy, rapidly-growing reef-building invertebrates is simply providing proper physical and chemical conditions. Maintaining calcium, magnesium, and strontium at natural seawater concentrations and alkalinity between 7 - 12 dKH is the first step towards achieving this goal.
All Brightwell Aquatics liquid water care supplements are made with purified water and high purity materials. We develop formulae for aquaria based on empirical data, using observation and measurement rather than theory.
Instructions and Guidelines
Basic: Shake product well before using. Add 5 ml (1 capful) of product per 20 US-gallons of aquarium water every other day or as needed to maintain the strontium concentration within a range of 8 - 12 ppm. When used in this fashion, 250 ml treats up to 1,000 US-gallons (3,750 L).
Advanced: Determine the strontium concentration in the aquarium using an accurate test kit before supplementing. Shake this product well before using. Each ml of Brightwell Aquatics Strontion will increase the concentration of strontium (“[Sr2+]”) in 1 US-gallon (3.785 L) of water by 8 ppm. If the initial [Sr2+] in the aquarium is below 8 ppm, add this product at the maximum rate of 10 ml per 20 US-gallons daily until the desired concentration is attained, then dose daily or weekly as needed (see below). If not using a test kit, add 5 ml (1 tsp) of Strontion per 20 US-gallons of aquarium water in two-day intervals to maintain the [Sr2+] within the proper range. Always try to maintain the [Sr2+] within a range of +/-2 ppm. To determine the dosing rate of this product once the desired [Sr2+] has been acquired, measure the daily rate of strontium uptake (i.e. the decrease in strontium) in your aquarium by measuring the aquarium`s [Sr2+] at the same time each day over a one- to two-week period. To determine the daily dosing rate (preferable to weekly dosing) for strontium maintenance: estimate the volume of water in the entire aquarium system; divide the daily decrease in [Sr2+] by 8; multiply this number by the volume of water in the system to get the daily dosage required (ml) to maintain a stable [Sr2+]. Daily dosing maintains a more stable [Sr2+] (and more natural environment) than dosing weekly, in which the [Sr2+] spikes just after dosing and then gradually decreases throughout the course of the week.
Caution: Keep out of reach of children. Not for human consumption.
Strontium (min) 896 mg/oz. (30,280 ppm)
Purified water, Strontium chloride
Brightwell Aquatics Aquarium Supplies
The goal of Brightwell Aquatics is to provide the absolute highest quality, scientifically-sound products and customer service of any aquarium water care manufacturer, and to do it all in a straight-forward and honorable fashion. All Brightwell products are formulated by marine scientists with a passion for the aquarium hobby. They utilize the highest purity ingredients in concentrations that provide the most use to hobbyists. Nearly all Brightwell Aquatics products are over 99.9% pure. The usage guidelines of Brightwell Aquatics products are written in plain language but the company is always available to answer consumer questions. All products are lot numbered for quality control and customer service.
We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in 5-7 business days.
Over 90% of our members receive their orders within 2 business using UPS Ground. Upgrade from free economy shipping to UPS Ground for only $4.99—or spend $199 and we’ll upgrade you automatically!
Expediated shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.
Same-day shipping is available Monday-Friday for most products—place your order by 10 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.
Learn More About Shipping
Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.
A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.
Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.
Learn More About Returns
Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!
- Most Products
Earn 5 reward points for every $1 you spend to get 5% cash back
- Marine Depot, AquaMaxx, Accel Aquatics, and Korallin
Earn 6 reward points for every $1 you spend to get 6% cash back
- Aqua Illumination, EcoTech Marine, Nano Box, Neptune Systems, NYOS, Oceanbox Designs, Pax Bellum, and Reef Glass
Earn 1 reward point for every $1 you spend to get 1% cash back
You can also get bonus reward points by purchasing select items during special sales and promotions.
Learn More About Rewards