This is daft but i was watching the film E.T the other day and i saw a large bowl with guppies in and that's what got me thinking do guppies really need and filter ( i know it's just a film). I don't really mind about a box filter it's just the air pump that annoys me shame we can't run a filter on fresh air. The only other problem with not having a pump is that a film builds on the surface, the only way i can think of keeping that down is to put some floating plants in there would that help.
I don't really want to keep females and males to gether for obviuos reasons, but i was a bit worried that the males would fight. Any ideas, i mean if i was to keep males and females together once the eggs were laid could i not just take them out, oh hang on a minute are they livebearers might have a bit of trouble if they are lol, any ideas. Thanks