my darf gourami died today, i was sad, but yet kinda happy since he was very mean, and my 4 month old guppys can finally be free in the tank since he was the only fish i was worryed about attacking my guppy fry.. ANYWAYS... i want to get a school of tetras, if i get about 3 neon tetras and 3 cardinal, will all 6 school together? or will the do there own thing?