Freshwater

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Part V: The Part of Tens
The Fish Law of Aggression
The fish law of aggression states that any two fish can show aggression
toward each other without just cause at any given moment of time. For this
reason, it is vital that you keep track of your fish’s social habits to make sure
that a minor scuffle does not end up turning into a major war. Rearranging a
few tank decorations every few months helps break down pre-established territories
and reduce potential aggression.
The Fish Law of Time
The fish law of time states that a fish will be prone to contract an illness the
day before your vacation starts, or at the beginning of a holiday weekend
when all of the pet shops are closed. That is why it is important to have extra
medication on hand for such emergencies. Training a friend, neighbor, or relative
in the basics of fish disease and treatment comes in handy if you happen
to be on vacation when disaster strikes.