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What do fish need to survive?

An air filter, food, enought space, the right temperature, clean water, a sucker fish will do
Water would be a good idea. Food and filters etc. would be an optional extra. Depends on how long you want the fish to live.
oxygen is the most important need for fish than comes food, light,etc
ilter ,air pump,light,food,gravel,toys in the tank,sucker fish to cleen the tank adn good enough space go to a fish store an ask i ask for an 10 gallon fish tank for 60 $ with adn filter andlight buld all u ahve to do is buy an air pump and sum fishes witch the toatal is 20 $ more basiclly its worth it good luck man and dn t buy gold fish they suckk
hmmm water first off, then an air bubbler, a filter, food, and space.. that’s about it
Same as what we as a human need :
1.air
2.food
3.water
4.shelter/ living place
5.mate (depend)
and what other that you think is relevance is the answer.
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Must have it !!!!!
The condition is depending on the type and species of the fish