Share 'New to slime moulds -- How many times can I grow a dish out and inoculate other dish with part of the original mould? Endlessly?'

Can I keep my one physarum polycephalum endlessly if I were to grow him to his dish fully, and inoculate another dish with a part of his self and tons of oats and then repeat that process? Another question: do they just like water agar and oats or would they like potato dextrose agar and oats more? Last one:  Could I fill a jar of oats, sterilize it, then put a mouldy guy in it?  What would hap…