I keep my 3 male bettas in 1 gallon...(snip)....it is an proper hom for a betta.
I always thought that a. 3g was the minimum, and b. you should never ever keep males together. I dont have the experience to say that for sure (not a betta fan myself), but I'm sure someone more into bettas might be able to help you out on that one, as it sounds a bit likely you've been given some bad info there
If I were in charge of the world for a day lol I'd make sure there was mandatory labelling of fish in LFS with both common name and latin name, adult size, care needs and minimum tank size needed - preferably controlled in some way (ie had to get their labels from one body who would have the correct info).
I'd personally ban anything under 15g too, but no doubt wouldn't be too popular then...maybe just remove them from general sale so that newcomers/kids cant get these tiny tanks and put a big community of commonly found fish in them, and that way as the smaller tanks weren't totally banned - it'd mean the betta breeders and other people needing tiny tanks could still have theirs made or make their own.
- Banning, aside from special order, the sale of common plecos or any plecostomus that gets to a similar size.
- Banning the giving away of fish as "prizes" for contests at fairs (know this isn't really part of the fish trade, but its a horrible practice)
With all due respect, there are far more fish out there that get much bigger than common plecs. Even gibbies get bigger than commons
As a common can go in an easily manageable tank size (4ft x 18" x 18") that most folks could fit in their room, I dont see why banning them would be fair?
Many of the plecs that get bigger also take years and years to get there. Biggest plec I've seen photos of was an L203, 70cm, and yet at a growth rate of 1" a year - is it really that big a concern? Plenty of time to get a bigger tank or rehome - unlike quick growing massive predatory fish.
Dont ban commons though. They're tiddlers compared to the main offenders.
In the UK fish prizes are illegal.