Hi - I'm new to this forum, so apologies if I've put this in the wrong place.
We have a tank with lots of guppies, some neon tetras, and a few glowlight tetras, (and a very peaceful plec and bristlenose catfish.)
We'd like to add one more shoaling species, and were thinkng about rummynose tetras. I've seen several websites suggesting these would be compatible with the others in the tank, and a couple that have said they wouldn't be, but not explaining why.
My main concern is that last year, we had lots of guppies, and added 6 zebra danios which we'd been told would be fine together. Very quickly all the guppies died, and we think it was the danios, either because they were directly chasing the guppies, or just sressing them out when they zipped about the tank. And the rummynose tetras look quite zippy too, certainly much more active than the other tetras we've got.
Any advice/experience very gratefully received, many thanks !