MACROALGAE (MACRO)
Large multicellular algae. (green, red, yellow, purple, and brown varieties)
MAGNESIUM (Mg)
MAIL ORDER (MO)
MANTIS SHRIMP
Common name for predatory marine crustaceans of the order Stomatopoda. These crustaceans have powerful, modified appendages which they use for defense and in subduing prey. The ‘smashers’ have calcified, club like appendages, while the ‘spearers’ have sharp, pointed appendages. Often seen as pests, they are known as ‘thumb-splitters’ and for their ability to break aquarium glass, but some species are prized for their attractive coloration.
MARINE
Refers to a saltwater aquarium or environment.
MARINE AQUARIA CONFERENCE OF NORTH AMERICA (MACNA)
MARINE AQUARIUM SOCIETIES OF NORTH AMERICA (MASNA)
MARINE ROTIFER
Brachionus sp. Live food cultivated to feed marine Fry and other marine organisms. The Rotifer itself has little nutritional value, but it can serve as a food delivery system for the needed nutrients provided through the food (usually microalgae) that fills their bodies.
MAXI JET
A type of powerhead or pump.
MEDIAN FINS
Fins that are unpaired.
METAL HALIDE LIGHTING (MH)
These bulbs reproduce, most closely, the full spectrum of the sun, providing ultraviolet, visible, and infrared wavelengths.
MICROALGAE
Microscopic single celled algae.
MILLI-EQUIVALENTS PER LITER (Meq/L)
MILLIGRAMS PER LITER (Mg/L)
MILT
Fish semen.
MINI JET
Power head pump used to move water, recommended for use with refugium.
MIRACLE MUD (MM)
Method of aquarium filtration. Also claims to replenish trace elements.
MOUTHBROODER
Fish which protect their eggs and/or young by holding them in the mouth. Some may also clean their young in a similar fashion.
MULM
Solid waste materials such as plant parts, fish excrement and leftover food in various stages of decomposition. Aquatic 'compost' which benefits plants, but in an unplanted, poorly maintained system may result in a buildup of humic acids which will decrease pH over time leading to Old Tank Syndrome.
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