some of your option choices would indicate otherwise, even the most novice of fish keepers know that you cant house 2 male bettas together in the same tank nor can you cram 50 cardinal tetras or a single discus in a 10g with success while including the welfare of your animal. this is why i came to the conclusion i did, that you probably dont have the experience to handle such delicate marine systems if your making such basic freshwater fish keeping errors.
im also curious as to what source recommends putting the 3 options above into action?
the three ideas mentioned are not just "crazy but interesting", as you colourfully put it, they are out right ludicrous.
thats one way to put it.
you are getting opinions like you requested and it appears you dont like what your reading.