I'll probably be doing water changes every week or week and a half if they don't have a filter so would that be alright?
I heard from someone that they have a friend who leaves his/her fish tank in the sun and the guppies eat the algae so he/she doesn't ever have to feed them.
I've done some asking around other forums and a few people said they know people or themselves don't use filters for the guppies and they live just fine. Is that true?