First things first. 120g is not substantial for any more fish.
Get a new tank, cycle it and then pick your stock.
Always quarantine new fish. You're playing Russian Roulette every time you don't quarantine for at least 8 weeks.
Get a new tank, cycle it and then pick your stock.
Always quarantine new fish. You're playing Russian Roulette every time you don't quarantine for at least 8 weeks.