Big Tank = Many Bettas?

Hello,
I have a 430 litre tank, fully planted, with 10 congo tetras, 25 cardinals/neons, 8 harlequin rasboras, 7 cherry barbs, 6 ottos, 6 bronze corys, 5 rams, 3 SAE, 2 panda cories, and a betta.
He loves it, no problems with other fish.
Recently I was talking to a very experienced aquarium friend, and he said that due to the size of the tank and lush vegetation, I could put a second and maybe third betta in the tank.
Or maybe a couple females?
What do you think?

 

forgot to add a pic!

 

You'd could TRY it, I don't love the idea. But it all depends solely on the temperament of both your betta and the ones you put in. Keep them in a clear breeder to see how they react to the other fish

 

It all depends. Do you have any spare tanks to put them in in case it doesn't work out? I have not had much luck even with female betta sororities. They all eventually kill each other. I gave up on this scheme awhile ago, and went for fish that could actually live together. Dwarf gouramis or so-called American flagfish still have a "beta" feel.

 

I have something like that, that said I did not do it on purpose... I was planning on a sorority and some of the females turned into males... I bought them as babies so they had to been mis sexed... since they were there since they were tiny I haven’t had too many problems... but be ready to slip them just in case

 

Here is the pic

 

It all depends. Do you have any spare tanks to put them in in case it doesn't work out? I have not had much luck even with female betta sororities. They all eventually kill each other. I gave up on this scheme awhile ago, and went for fish that could actually live together. Dwarf gouramis or so-called American flagfish still have a "beta" feel.

Dwarf gouramis are actually pretty closely related to Bettas too, so I'd also recommend getting a pair, males may end up fighting though so I'd go with a male/female pair (you'll have to order them. Most stores don't sell females because they're not as vibrant, and because of breeding)

 

There are a few issues to consider. First is that there is no gurantee that just because you have space that the second betta will not want the first betta's territory. Or that he won't set up in close proximity. Or just that he doesn't like other bettas and will spend his days hunting the one he saw on the other side of the tank.

Also with tanks this size there may be issues with water flow meaning bettas may end up in the same parts of the tank that have a slow/no flow hence ending up with them being too close together.

No experience of females personally but from what I've read they become egg bound when in close proximity to a male which can lead to issues if they don't breed

 

I'm just here to ogle miles' tank!

 

Thank you all for your replies.
The points you made are exactly what my concerns are. In particular, the point regarding the "ideal" low-flow parts of the tank, which are in the thick vegetation and under the anubia leaves. The betta and congo tetras are rarely together, the congos are in the "open water" looking for current. The rams usually keep to the bottom of the tank, the betta it at the top. But a second betta might also want the prime real estate!
Maybe I'll give it a go when I feel OK to maintain a second tank. But for now, this big one is plenty!