Thanks everyone, still in recovery from another fish juggle on Sunday to isolate my Lionhead Cichlid family (~35 fry now ~1 month old) into the 620T for now, who were terrorising my poor ~18cm Synodontis decora in the Rio240 (now much happier with Golden Wonder Killifish; ABF; young Hoplos; Rabbit Snails for company). Got a "PIR Smart Cam" as a pressie and it was great to see footage of the tank today from after dark last night, it has a brilliant night vision mode (will upload a clip to my youtube soon).