Good options there... Red eyes gets to be fairly large though (6-7 cm) Emps more like 4-5 cm.Red eye or Emperor are fairly chunky and look hood
Lol - but true in a good way.and look hood
Red eye or Emperor are fairly chunky and look hood
One of few tetras I hadn’t owned until tecently but they are really good fish; handsome and lively , even boisterous, with interesting behaviour. Not tiny by any means - the eye colour tells you the gender which is s novelty!I was looking at Emperor Tetra but the smaller size gave me doubts, They do look cool.
Very, true. Lots of tetras can turn into fin nippers. They are opportunistic micro predators after all.I had no problem with red eyes and angels in a planted 36” tank and a big group of red eyes but there is a risk, it’s very specific to the individual fish and the set up.
From observation I’d agree. I have noticed that as the shoal ages and some die, at some point there’s a critical number where nipping starts. Right now I’ve a group of tetras that have reached 7 in number and it’s started.I read a paper a few years ago that suggested tetra were nippy in smaller groups (defined as 6 or below I think) because of an increase in social aggression caused by an insecurity due to lack of numbers. It showed even peaceful species experienced this by measuring cortisol. It's why if returning them isn't an option then upping the numbers of the serpae might be the best thing to do if you have space. The more of them, the more secure they will feel and the more their social hierarchy will develop to a point they squabble amongst themselves and ignore the other fish but I would warn you that a settled fish can change its behaviour and slow moving angels are a nice target. I hope it doesn't get to that point but just watch their behaviour.