Are they compatible tank mates????

[eatmice2010]

I was wandering if Killifish are compatible fish mates with bettas?
Here's an example:

[aemaki09]

Maybe with females, but they are too colorful to be housed with males IMO.

[blu the betta]

ive heard that they are. but not sure about bright colored ones though.

[eatmice2010]

Do yall know how big they get?

[aemaki09]

it depends on the type you get. there are tons of different killifish out there

[fishy314]

i agree w/ aekmaki09 killies are territorial on their own and definitely dont need a betta to aggravate them even more.

[bettaisbetter]

I don't think so, they're like really bright and colorful PKs. Aren't they fragile and require low pH? Bettas like low pH, but they can adapt.

[Aoicat]

Well, due to some happenings at a recent auction, I've ended up with two in my Betta tank for a week or so now. They seem to be getting along ok, but Walter (my betta) flares at the bigger one every once in a while. The ones I have are not very colorful, so I would be very hesitant about putting any bright ones in with a betta. I don't plan on keeping the ones I have in there any longer than necessary.

[LittleBettaFish]

Killifish don't make very good tankmates for bettas. Depending on the species, killifish can be aggressive or shy, and their bright colours and very erratic swimming patterns would stress out a betta.

I keep both and would never house them together.

[OrangeAugust]

Someone also told me that killifish prefer water temps cooler than what bettas like.