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.

Dissolved organics are organic compounds suspended in aquarium water that originate from food, waste, coral mucus, bacteria, and other biological processes. These compounds play an important role in nutrient cycling and can serve as a source of nutrition for corals and other reef organisms.

Coral health refers to the overall condition and well-being of a coral, including its growth, coloration, tissue quality, feeding activity, and ability to withstand environmental stress. Healthy corals are better equipped to grow, reproduce, and thrive within a reef aquarium.

Coral growth is the process by which corals expand their tissue, build new skeleton, and increase in size over time. Healthy coral growth is influenced by a combination of lighting, nutrition, water chemistry, stability, and overall reef conditions.

Coral food refers to any natural or prepared nutritional source that provides corals with the proteins, amino acids, fatty acids, vitamins, and other nutrients needed for growth, coloration, tissue repair, and overall health.

Coral feeding is the process of providing corals with food and nutrients beyond what they receive from photosynthesis. Through feeding, corals obtain proteins, amino acids, fatty acids, vitamins, and other essential nutrients that support growth, coloration, and overall health.

Coral coloration refers to the pigments, fluorescent proteins, and symbiotic algae that give corals their unique colors. Healthy coloration is influenced by lighting, nutrition, water chemistry, genetics, and overall coral health.

Copepods are tiny crustaceans that serve as an important food source for corals, fish, and other reef inhabitants. As a natural component of marine ecosystems, copepods help transfer nutrients through the food chain and contribute to overall reef health.

Carbohydrates are organic compounds that provide a readily available source of energy for living organisms. In reef aquariums, carbohydrates contribute to coral nutrition by supporting metabolic processes, growth, and overall biological function

Calcium is one of the most important elements in a reef aquarium and serves as a primary building block for coral skeletons. Corals continuously consume calcium as they grow, making it essential for skeletal development, coral health, and long-term reef success.

Broadcast feeding is a coral feeding method where food is dispersed throughout the aquarium water column, allowing corals and other filter-feeding organisms to capture nutrients naturally. This approach closely mimics how food is delivered on natural reefs.

Bioavailability refers to how easily a coral can absorb and utilize a nutrient after it enters the aquarium. A nutrient may be present in the water or food, but if the coral cannot efficiently use it, its bioavailability is low.