Tropical Fish Keeping - Aquarium fish care and resources

Tropical Fish Keeping - Aquarium fish care and resources (
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Aquatic_Fan 12-10-2007 06:12 PM

Stunt Fish Growth
Was wondering how a fishes growth can be stopped? I have a few fish that have seemed to stop growing except my mystery

Are there any particular reason on why this happens?


Lupin 12-10-2007 10:23 PM

How often do you change your water and how much? Water parameters?

MattD 12-11-2007 01:00 AM

Fish excrete growth pheromones, the size of the body of water determines how large the fish is able to grow. The thicker (undiluted) the pheromones are, the less the fish grows. The thinner (diluted) the pheromones are, the larger it will grow.

Water changes dilute the pheromones, simulating a large body of water. This, in turn, allows a fish kept in an enclosed space to grow to its maximum potential. Theoretically the only element limiting its size is the tank size itself (and one's prudence with changing the water). If the pheromones are too thick, it is possible to stunt the growth of the fish, likely killing it.

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