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TANK RAISED (TR)

Animals that are hatched in captivity and raised from eggs.

TAP WATER PURIFICATION (TWP)

TARGET FISH

Fish added to an aquarium with aggressive breeding fish. These fish serve as a ‘common enemy’ upon which the breeding pair can vent their aggression, preventing the pair from attacking each other. Compare Dither Fish.

THEME

A looser equivalent of the Biotope Aquarium, it gathers fishes and/or plants coming from different biotopes but from the same general region, e.g., "Amazon Theme" or "South-Asian Theme".

THIN FILM COMPOSITE (TFC)

Type of Reverse Osmosis (RO) membrane

TOTAL DISSOLVED SOLIDS (TDS)

A measure of the elements and compoinds other than H2O in a sample of water.

TRACE ELEMENTS

Minute substances found in water that are needed for proper plant and fish growth. Usually replenished with partial water changes.

TRICKLE FILTER

A wet dry filter using a drip plate to disperse the water over bio-media.

TRITRATE TEST METHOD

A specific method of water testing in which a reagent is dropped into a sample until a color change is noticed. More accurate than color comparison test methods.

TURNOVER RATE

The number of times the water in an aquarium is passed through the filtration system in one hour. The minimum should be three or four times per hour

 

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