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Brightwell Aquatics Reef Snow - Replicates Marine Snow in all Marine Aquaria 500ml / 17oz


Item #: BW01228

In Stock

Replicates Marine Snow for Corals & other Suspension-Feeding Marine Invertebrates

  • Complex of carbonate-bound, non-conservative major, minor, and trace elements in aragonite ratios, as well as marine-derived proteins and lipids in coral tissue ratios.
  • Simultaneously delivers appropriate inorganic and organic nutrients required by stony corals, both zooxanthellate and azooxanthellate soft corals, gorgonians, clams, tube worms, sponges, tunicates, and other suspension-feeding invertebrates for growth of both soft tissue and skeletal material.
  • Ideally fed at night when most corals extend their tentacles for prey-capture.
  • Does not require refrigeration.
  • Formulated by a marine scientist.
Technical Background
Marine snow is a term coined by oceanographers to describe aggregate particulate material (which may or may not be organic) falling towards the sea floor; the material, itself, is largely composed of the remnants of deceased zooplankton and large phytoplankton. These organic particles typically become colonized by various microorganisms (primarily bacteria and protozoans) during their descent towards the sea floor; the decomposition of the organic material by the microorganism “colony” on each particle recycles the nutrients locked up within it. The constant descent of these particles through the water column has the appearance of snow fall, hence the name “marine snow”. While marine snow is primarily associated with productive regions of the open ocean rather than tropical coral reefs, the concept (with some improvements addressing the requirements of reef-building organisms) may be applied to reef aquaria as a means of simultaneously delivering organic and inorganic nutrients to corals and other suspension-feeding invertebrates. Brightwell Aquatics Reef Snow effectively replicates the concept of marine snow by combining a “core substrate” of carbonate-bound, non-conservative major, minor, and trace elements (all in aragonite ratios) with marine-derived proteins and fatty acids (all in coral tissue ratios). It does not contain any sugars or their derivatives. Reef Snow delivers both organic and inorganic nutrients to corals and their allies, clams, tube worms, and other suspension-feeding marine invertebrates; it may be of particular benefit to the hobbyist wishing to maintain azooxanthellate soft corals in deep-water biotope aquaria. The collective benefits of providing these nutrients in the same “package” are increased growth rates of both soft tissue and skeletal material.
Reef Snow does not require refrigeration, however storage in a cool, shaded area will prolong the shelf-life. Refrigeration will maximize the shelf-life of the product.

Instructions and Guidelines
Shake product well before using. Turn protein skimmer and other forms of mechanical filtration off prior to adding Reef Snow to aquaria, and allow 10 - 15 minutes after use before resuming operation of filtration. Most zooxanthellate corals extend their tentacles at night, when the majority of coralivorous and zooplanktivorous fishes are asleep and the abundance of zooplankton in the water column passing over and through the reef is at its greatest. Therefore, the most sensible time to feed Reef Snow to corals is after all lights in the aquarium have been off (preferably for at least one- to two-hours) and the room is dark. Using a dim flashlight, illuminate the area immediately upstream of the coral to be fed, then feed as directed below. Slight cloudiness of the aquarium water accompanying dosage of Reef Snow is a result of the inorganic active components entering solution and will dissipate rapidly.

Target Feeding (recommended): Target feeding may be carried out with a lengthy piece of rigid air tubing, plastic syringe, pipette, dropper, or similar device; suck a portion of Reef Snow into the feeding device, then slowly discharge the contents of the device 2 - 4” upstream of the target organism(s). Repeat these steps as deemed necessary. Do not place items that have been exposed to aquarium water inside this container without first thoroughly rinsing them (inside and outside) with fresh water; failure to do so will contaminate the product and encourage it to decompose. See ‘Notes’ below regarding maximum recommended feeding amount.

Broadcast Dispersal: Add up to 2.5 ml (½-capful) per 50 gallons of water in the entire aquarium system in an area of rapid water movement every other day for the first four weeks of use; thereafter, the dosage may be gradually increased if desired.

Notes: Reef Snow should be considered a type of food. Add no more than 5 ml total of liquid food suspensions per 50 gallons of water in the entire aquarium system daily for the first four weeks of use; thereafter, the dosage may be gradually increased as desired. Caution: Keep out of reach of children. Not for human consumption.

Guaranteed Analysis:
Carbonate 2,769 mg/oz. (93,600 ppm), calcium 1,627 mg/oz. (55,000 ppm), strontium 32.5 mg/oz. (1,100 ppm), magnesium 4.4 mg/oz. (150 ppm), potassium 0.3 mg/oz. (10 ppm), moisture (max) 70%, protein (min) 0.5%, lipids (min) 0.15%, fiber (min) 0%.

Purified water, carbonates of calcium, strontium, magnesium, potassium, marine-derived proteins and lipids.

Manufacturer information

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.

5 Stars


Reviewed on
January 05, 2020

Yes, I would recommend this.


Pros: Value, easy to use. Corals swell and love it

Cons: None

Good product and very good price.

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Reviewed on
April 15, 2019

Yes, I would recommend this.

No refrigeration

Pros: No refrigeration

It's awesome that you dont need to refrigerate this product compared to others. I didnt notice any extra growth but didnt notice that corals were happy while feeding this.

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Reviewed on
October 09, 2018

Yes, I would recommend this.

Polyp Extension

Pros: Polyp Extension, Excellent Feeding Response, Does not require refrigeration.

Cons: Slightly expensive

This is the only product I've ever dosed that caused all of my LPS to have excellent Polyp Extension within probably a minute or so. SPS also have great extension, Green Slimer polyps extending about 2.5x the normal size. Soon as it hits the water all the fish know instantly it's feeding time as well. When you dose it manually you'll see how packed it is with goodies for fish and inverts alike; It's got a very dark coloration to it, full of reef snow! I would absolutely recommend this product

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Reviewed on
August 18, 2017

Yes, I would recommend this.

Reef Snow

Pros: No refrigeration needed

Cons: Didnt see any rapid growth

I like that after opening no refrigeration is needed. I see polyp extention when i feed.

Was this review helpful? 3 0


Reviewed on
June 28, 2017

Yes, I would recommend this.

Highly Recommend

I also tried 3 little fishes..then i tried this..starting to dose at night and follow the directions, its working awesome!! Even more appealing it comes in bigger sizes also!!

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Reviewed on
June 26, 2017

Yes, I would recommend this.

Absolute must for coral food!

I have been using Brightwell Aquatics Reef Snow to feed my corals for over a decade now. It is an absolute must, and the staple diet of all corals and pods. I have grown my pod population to mass numbers with this as well. This is a must have for coral and pod food!!

Was this review helpful? 3 0


Reviewed on
May 27, 2017

Yes, I would recommend this.


i usually use the Two Little Fishes Marine snow..i like this very much...it comes in a variety of sizes, you don't have to leave your filtration off for as long. First time using it but all seems to be great so far...maybe more microverty than the other...will keep updated...says to feed in the night but my corals seem to open in the night as well

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eric benton

Reviewed on
September 14, 2012

Yes, I would recommend this.

Reef Snow

I love the squeeze applicator, my corals and even my barnacles (picked up on the seashore by my daughter for me and quarantined for awhile in my QT tank) love it. I will be staying with this product, it makes my corals and my gorgonian very happy and healthy with no apparent biological load effects (e.g pollution).

Was this review helpful? 4 0


Reviewed on
August 04, 2012

Yes, I would recommend this.

Reef Snow formula works

I've been using Reef Snow every other day (alternating with Brightwell Liquid Reef) in a mixed tank of softies, LPS and SPS. Everything is vibrant and thriving. I've just ran out and am planning on ordering more.

Was this review helpful? 2 0

mitch wilmer

Reviewed on
January 25, 2010

Yes, I would recommend this.

Great for clams

I have to say my clams love this stuff. They seem to really go for it. A couple of minutes after I add it to the water, the clams start gobbling it up, opening and closing. After I use it, the clams tend to look healthy, really opening up.

Was this review helpful? 12 0

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