Due to work commitments, we are unable to take a long vacation this
summer so are planning a series of short breaks instead (e.g. long
weekends).

We have a 50g reef tank, fish and inverts, lots of LR, 9 months
established, very stable. Fish normally get fed once a day (frozen
food) - no fussy feeders.

Rather than keep bothering the neighbours, how long is it
safe/responsible to leave this kind of tank unattended. What
precautions would you recommend to minimise the risk of occupant stress
or some kind of disaster?