I have 6 silver tips in my planted tank. I've never noted agression with other fish other then the fact that they can be quite fast at feeding time so those that are slower might miss the food they were aiming for. They've never bothered the black phantoms, neons, danios, guppies, mollies, pristillas, white clouds, or others that I have ever noted. I would recomend them for the community tank... but keep in mind that their ability to really swim fast may bother some of the slower moving fish.
ALASKA