Between them and the cichlids you shouldnt have any problems. I highly reccommend keeping them in a group of 4+ if you dont keep the numbers up you often will see a lot of agression, usually one dominant fish will bully the other one or two synos. Keeping them in a group usually distracts them enough to stop fights, provided you have enough synos and enough space they are lovely active catfish that are brilliant at finding all the uneaten food in your tank and providing entertainment!