The tank size can be considerably smaller, assuming that you aren't cramming them together. Each inch of fish length will need about 2 gallons, so a common sized fish will need 12-16 gallons to stay happy, although they are tolerant of less.
not sure of the practicalities of keeping an 8" cichlid in a 12-16 gallon tank, that sounds a bit silly to me. --Cat 18:43, 8 January 2009 (UTC)
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