Tiger barbs

[Pleco11771]

So I have a 20 gallon high with 4 cories, 2 albino, 1 julii, 1 emerald green. Anyway so I have always wanted tiger barbs and finally have made my move. I got 3 today and believe 2 female 1 male but noticed them pecking the cories. I plan on getting 4 more tigers and was wondering if I should get more and the problem will seace with the 7 school or make it worse ??? Help!

 

[Mrc8858]

The school should help but I gotta tell u those barbs can be some serious lil a holes lol

 

[Aces11]

Increasing the school is supposed to help lessen the aggression, though tiger barbs are known to be extreme fin-nippers.