Ive got an Electric Catfish in a 40x18x18 tank with a small pair of Dovi a small midas and a small gibbiceps pleco. And i know that synodontis are shock proof but would i be ok to add from one of my other tanks a 3-4" Syno pectrolia, and 2x 3-5" Syno Decorus. Are these 2 synos shock proof? Thanks!