New to aquarium keeping, looking for advice

[Myraan]

I reckon a 30 gallon with 15 tiger barbs would look awesome.

 

[Essjay75 190]

And that could be 5 regular tiger barbs, 5 albino tiger barbs and 5 green tiger barbs

That would look like 3 different species but the fish would know they are all the same species.