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Old 04-10-2008, 01:59 AM   #86
Senior Dragon
Join Date: Oct 2007
Posts: 3,515
Default Salt and minerals (freshwater)

Salt and minerals are important for biological functions. In freshwater, the concentration is much higher within the fish’s body than surrounding water. With the understanding of the process of diffusion, the salt and minerals will move out and water will move into the body. The excretory system must get rid excess water and retain salt and minerals. On average, Freshwater fish has bigger kidney and urine more as compare to saltwater fish of the same size.

Question 1: Removing fish feces will prevent NH3 and NH4 build-up?
Question 2: Guppy needs salt?

Last edited by angelo; 04-10-2008 at 02:25 AM.
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