This package includes the Kessil H80 Tuna Flora LED Refugium Grow Light, the Kessil LED Light Pendant MIni Gooseneck Clamp/Mount for the light, the Brightwell Aquatics ChaetoGro, 250 ml, and the MarineAndReef.com Cleaning Towel. This package is for developing a chaeto refugium for your saltwater aquarium in order to remove undesirable nutrients. Brightwell Aquatics ChaetoGro is a complete phosphate and nitrate free multi-nutrient with iron, cobalt and molybdenum for chaetomorpha growth and vigor in all marine systems. It's essentially an algae fertilizer. The MarineAndReef.com Towel is perfectly absorbent for any spills, messes, or accidents, and a no-worry solution to stop ruining your nice home towels. The Cleaning Towel is a durable, lint-free microfiber towel. 19" X 15". The Kessil H80 Tuna Flora LED Refugium Grow Light is a horticultural light that is fine tuned for photosynthesis and uses the same platform as the Kessil A80. There are no white LEDs in the Kessil H80, just blues and red in the right proportion to stimulate the chlorophyll of plants, be it plant clones from a garden, or marine plants. So if you've got a little macroalgae or turf algae scrubber, the pinkish light should fuel the most growth and export the most nutrients of any comparable white refugium light. Coverage is up to 24". The Kessil LED Light Pendant Gooseneck Clamp/Mount is a versatile mounting option that allows you to customize the positioning of your Kessil LED Fixtures.