Are within filter for goldfish bowls?

i use a real small filter for my gold fish bowl its similar to the one i use in my tropical fish
What do i nurture my goldfish?
Though near are filters made for small spaces, using one does not miraculously turn a bowl into an appropriate habitat.
Are BiOrb fish tank cruel?
Answers:    pen plax small world... sponge filters...
there are lots of filters for small tank and bowls. however, please to NOT keep a goldfish in a bowl. the only time a bowl is evenly slightly suitable is whether it's at least 2gallons and heated. then it is only suitable for a betta. and have a small filter will not eliminate water changes.
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