Thanks, that's what I thought too. Since the other catfishes of this tribe spawn in wood ''caves'' I assumed this would be the case with these too. Each fish has made it's own cave in a driftwood and digging it deeper by the time.
Don't know what kind of raphs others have, but mine are like dogs ...

So.. did the plan work? I'm thinking about taking the Raphaels outside next summer..when they are a little bit older.