Fish welfare and housing

Question 1

Chemical water quality considerations for fish

Answer 1

pH
hardness
salinity
expected chemicals
unexpected chemicals

Question 2

Dissolved gases in water

Answer 2

oxygen - much more in cold water
nitrogen
ammonia
carbon dioxide, can build up

Question 3

Water movement for fish

Answer 3

may be needed for normal behaviour
mixes layers of water
may disturb feeding patterns
may result in super saturation of gases
may disturb sediment
may disrupt nests
etc.

Question 4

Water clarity for fish

Answer 4

more important for owner than fish usually

Question 5

Methods of euthanasia of fish

Answer 5

• direct trauma +/- pithing
• electrical stunning
• clove oil
• MS222 or benzocaine +/- acetone
• thermal (contentious)