Phytoplankton are microscopic photosynthetic organisms that form the foundation of many marine food webs. In reef aquariums, phytoplankton serves as a valuable food source for filter feeders, zooplankton, and other organisms that contribute to a healthy reef ecosystem.

Phosphate is a phosphorus-based nutrient found in all reef aquariums and is essential for many biological processes, including energy transfer, cell function, and growth. While corals and other reef organisms require phosphate in small amounts, excessive levels can contribute to algae growth and reduced reef stability.

Nitrate is a nitrogen-based nutrient that forms as part of the aquarium's biological filtration process. While corals and other reef organisms can utilize nitrate in small amounts, excessive levels may contribute to algae growth and reduced water quality, making proper nutrient balance important.

Nutrient export is the process of removing excess nutrients and waste from a reef aquarium. Effective nutrient export helps maintain water quality, supports coral health, and prevents the accumulation of nitrate, phosphate, and other compounds that can negatively impact the reef ecosystem.

Nutrient balance is the relationship between the nutrients entering a reef aquarium and the nutrients being consumed, processed, or removed. Maintaining proper nutrient balance helps support coral growth, coloration, and overall reef health while preventing excessive nutrient accumulation.

Marine proteins are proteins derived from ocean-based organisms such as fish, crustaceans, plankton, and other marine life. They provide corals with highly digestible nutrition that closely resembles the food sources available on natural reefs.

Magnesium is a major element in seawater that helps maintain the balance between calcium and alkalinity while supporting numerous biological processes within a reef aquarium. Proper magnesium levels contribute to water chemistry stability, coral growth, and overall reef health.

LPS corals, or Large Polyp Stony corals, are reef-building corals known for their large fleshy polyps, visible feeding responses, and calcium carbonate skeletons. Many LPS corals readily accept supplemental feeding and are popular for their movement, coloration, and impressive growth forms.

Live rock is porous rock that contains beneficial bacteria, microorganisms, algae, and other forms of marine life. It serves as a biological filtration system, supports biodiversity, and provides habitat for countless organisms that contribute to the health and stability of a reef aquarium.

Heterotrophic feeding is the process by which corals obtain nutrients by capturing and consuming food from their environment. Unlike photosynthesis, which provides energy through symbiotic algae, heterotrophic feeding supplies corals with proteins, amino acids, fatty acids, vitamins, and other nutrients needed for growth and health.

Goniopora, often called Flowerpot Coral, is an LPS coral known for its long flowing polyps and flower-like appearance. Once considered difficult to keep, modern understanding of coral nutrition and water chemistry has made Goniopora a popular and rewarding coral for many reef keepers.

Flow rate refers to the volume and movement of water within a reef aquarium over a given period of time. Proper flow helps deliver oxygen and nutrients to corals, remove waste products, support feeding, and maintain overall reef health.

A feeding response is the visible reaction a coral displays when it detects food or nutrients in the water. Common feeding responses include polyp extension, tentacle expansion, mucus production, and increased activity as the coral prepares to capture and consume food.

Feeding frequency refers to how often corals are provided with food or nutritional supplementation. Finding the right feeding frequency helps balance coral growth, coloration, and health while maintaining stable water quality within the aquarium.

Fatty acids are essential organic compounds that provide energy, support cell function, and contribute to coral growth, coloration, and overall health. They are a key component of coral nutrition and are primarily obtained through feeding.

Dry rock is aquarium rock that contains little to no living marine organisms when introduced into a reef system. It serves as the structural foundation of the aquarium and gradually becomes colonized by beneficial bacteria, algae, and microorganisms as the reef matures.

Coral nutrition is the process by which corals obtain and utilize energy and nutrients needed for growth, coloration, tissue repair, reproduction, and overall health. Healthy corals rely on a combination of photosynthesis, feeding, and nutrient absorption to meet their nutritional needs.

Coral metabolism is the collection of biological processes that allow corals to produce energy, utilize nutrients, grow, repair tissue, and maintain overall health. Every aspect of coral life—from feeding and photosynthesis to growth and reproduction—is driven by metabolism.

Coral tissue is the living layer of a coral that covers its skeleton and contains the cells responsible for feeding, growth, nutrient absorption, and overall health. Healthy tissue is essential for coral survival and is often one of the clearest indicators of a coral's condition.

A coral polyp is the living animal portion of a coral colony. Polyps are responsible for feeding, growth, reproduction, and building the coral skeleton, making them the foundation of every coral found on a reef.