yes the useually need to be by them selfs they are pretty territorial and with ambush and bite passing fish to scare them of or to eat them the thing is that it would only take one bite from a puffer to kill it they just shred fish
I heard that they dont bother plecos for some reason. Also do you think an armored catfish would be ok? Do congo puffers get along with eachother? - Thanks
They are burrowers, so they prefer about 3" of sand that should be thoroughly stirred weekly. Mine doesn't touch snails, so a large apple snail might work as a maid. Bit a pleco in half. They go for the soft underbelly.