I'm in the French speaking part, but I've lived in the German part for a long time. The boundary between the two is known as the 'Röstigrabe': the rösti ditch.
(Rösti : Swiss dish made of finely chopped potatoes fried in rapeseed oil served with a fondue.
First of all: Welcome to the forum!
In answer to your question, I left my water sprite, amazon swords, and crypts in their pots for two weeks (tank troubles) and they all did fine.