guppy fry can live in a bowl without a filter, but you will need to net them up and completely clean out the bowl every second day. they also will need a heater, not negotiable! keep the water at 26-27*c (78-80*f) and prevent temperature fluctuations. they can survive in there for one month maximum before they get too big. this is just one example. you will need to specify what type of fish it is to get an accurate answer.
No fish is best for a bowl, buy at-least a one gallon tank with filter, and you will clean it once every 2 to 4 weeks, a bowl will have to be cleaned every week. Also, your fish can swim better with more room, become less bored, and will be happier. If this is above your budget, fish is not for you.
Cover the filter where the bubbles come from (like something nontoxic) then put a rubber band around it, so it doesn't suck them up .. I wouldn't put them in a fish bowl because it is too small, plus they will find some way out.. Hope this helps :)
you get someone to help you set up your bowl
It may be possible to keep 4 small fish in a one gallon fish bowl, depending on the type, size and needs of the fish you choose. It will also depend on whether or not the fish bowl has a filter, and if your fish can live without a heater. For example, because they do not get large, 4 white cloud minnows can be kept in a one gallon bowl with a filter and they do not require a heater. You can also keep a male beta or Siamese fighting fish with a few white cloud minnows; or 2 small goldfish which can grow too large or the bowl.
yes
yes
it is always good to get some kind of filter for your fish, but natural ponds dont' always need one. the filters will keep out some bad bacteria though, and keep your fish healthy longer, and allow you to actually see them. goldfish are very hardy and can withstand quite a bit.
every fish should have a filter exept bettas
once every three weeks
Sadly you can't but you can give them The bowl!
I can safely say no. I have tried this before. I went three months without cleaning or a filter, but the fish survived. And it was a baby! Then again, the fish was wild caught. (It is NOT endangered! It is your conventional minnow.)
you get a net to take out the fish and put it in a container while you're cleaning the bowl and put the fish back in when your done :) hope I helped :)