I have 5 Synodontis and 10 Corydoras as well as 4 striped rafaels, 4 pictus, 5 SAEs, 6 clown loaches, 4 Farlowellas, a dojo and a bristle nosed plecostomus in my 410 with no problems. There are 3 nigriventris, 6 albino aeneus and 4 julii. The nigriventris are over 6 inches. There are a lot of hiding places and plants - enough hiding places that I haven't seen all of the rafaels at one time since I put them in there over a year ago! All of the catfish types have been in the aquarium for at least a year. The Synodontis cruise all over the substrate at feeding time without bothering any of the other fish.
The fish I have seen try to swallow Corydoras in the past have been really sorry. The corys lock open those dorsal and pectoral spines and get really uncomfortable to swallow.
Beasts