Are these fish compatible?

Lupin

Consider the adult size. 3 12-inches balas will not match the likings of kuhlis, angels, danios and rummies.
Not compatible with kuhlis and tetras. BGKs are predatory and reaching 12 inches, predation occurs more frequently compared to being juveniles.

mr.bojangles

i know alot of ppl who have full grow clown knives in large planted aquariums and they dont touch anything ... i know a guys whos got them with neons with no problems ... u just got to give them ther own cave in the corner and spot feed em lots

Lupin

Oh, experiences are not always the same but on the side note, keeping them together is still not recommended. This is on the precautionary side.

Knives are still predatory regardless of whether you wish to keep dither fish there or not. Well, it's up to you but I'm sticking firmly to my recommendation that neons will not mix with predatory fish. Sooner or later, there will be a time when most small fish disappear.

mr.bojangles

i wouldnt put them with neons either but iv seen it done ... also bgk have small mouths and a full grown rummy will probly not fit ... thats also the reason for the large school

as long as u keep it well fed it will pretend the other fish dont exist

lioness501

id definately go with denisoni barbs instead of balas. the biggest ive seen is 6 inches and they have fantastic colouring. they r pricy but cheaper if u can get them as juvenilles. id also go for something other than the danios. imo they r too common and boring. but its in ur taste so go with wat ya fancy ;)

xingumike

wrong wrong wrong.

BGK mouths appear small, they are actually bigger than they appear, i had a 5-6 inch BGK that had no problem picking off rummys, it did 9 in the last week i had it in my tank.

its natural instinct is to hunt in the dark, its one of the reasons the species survived and isn't extinct.

your posting style is frankly annoying as well, lazy.

Falina

In general there are certain fish that you shouldn't keep with others but obviously there will be exceptions. It is then up to you if you want to take the risk of putting certain fish together that, on most ocassions, will not work. It is possible all will be fine, but much more possible that all will not be fine.

Black Ghost Knives have much bigger mouths than you'd think. I wouldn't think tetras would last long.

Again, I'd strongly suggets no Balas purely because of the size of the tank, and the numbers that balas generally require to feel safe and secure.