Fish compatibility question

[dwarfgourami]

"I had three cory pandas thought I'd add a number to their shoal and it didn't seem to ever become part of the goup, it still remains apart. My suggestion is they go well in threes, sixes, nines etc "

That's more likely to be because it was added later. I am not sure corys can caount that well. I've got 5, all added together, and they get on fine.

 

[NinjaSmurf]

One of my cories hardly ever shoals with the other ones, but he was like the third one I bought, so that's why I bought another one to make it four, now sometimes they pair up, or swim together in a group, but 8 out of 10 times I look in the tank that one is still off by himself.

 

[sylvia]

I would start by adding 3 more bronze cory catfish as they are shoaling fish, 4 more rummynoses as the minnimum group size for these is 6 and then maybe some platies - a couple of males (so they don't breed) would be best but you might preffer a trio (1 male, 2 females). Cherry barbs aren't schooling fish and do fine in pairs so don't add any more. You will still need to keep up with water changes and gravel vacuums.