20g fish to cause schooling

[Case72]

I have recently established my 20g tank and it is amazing. What I would like is one last fish that will cause my current fish to school a bit more. Currently the barbs are more likely to stay together than the danios from what I've seen, but they are all over the tank. I know this means they're not stressed which is great, but what's something I can add to keep the fish just a little bit cautious. Here's what I have...

20g high
Top fin 20 filter
Aqua clear 50 filter
Aqua clear 30 power head running across the top

1 gold dubloon Molly
5 danio rerio
5 tiger barb
1 clown pleco

1 cryptocoryne wendtii
1 driftwood
1 rock cave

I know it's pretty much full, but I would like to add 1 more to cause more schooling.

Thanks to any responses!

 

[cgthebeast]

Ehh, well tiger barbs IMO are Devils so that really cuts down your options. Plus they get3in a piece so I wouldn't add anymore to the tank

 

[Mebbid]

I don't believe there are any fish that would safely cause your fish to do what you want, especially in a tank that size.

 

[BTM88]

I added 2 Blue Rams (male and female) and my Glowlight tetras have started staying together more often. My Blue rams do not bother my tetras though, so that might be an option.

 

[Case72]

Oo ok awesome. So even though they're peaceful fish I guess their presence does what I wanted. Cool, I'll consider them. I would love to get an A. Cacatuoides. Not sure if that would be too aggressive though.

 

[Mebbid]

I really wouldn't expect miracles by adding a blue ram. Fish will eventually get used to any new addition and go back to their old behavior. I also wouldn't put a blue ram into anything smaller than a 30g due to how fragile they are.

The A. Cauticoids are nice fish though, I don't think I've ever seen them before.

 

[Rivers2k]

the fish you choose are loose schoolers meaning they stay in groups but don't swim all the same direction like cardinal tetras do. In a tank your size you aren't going to see much schooling action our of tiger barbs or danios.