I don't do holidays much less stressful.

Best answer though is to find someone knowledgable and get them to look after them with clear instructions noted against each tank stuck on with sellotape.

Also measure out all the food before you go aim to feed them half of the usual.

Also get them to come around to do some water changes before you go on holiday so they a familiar with the routine.

__________________
Alan

Thweeerp!