Question about an old starter of my grandma
So this starter my grandma used to make my mother put it in the refrigerator ,it's being there for a while like years xD it was like rock. And then there was some molded parts that we took off. and then i try to activate with oil water and the old starter and left it for a night next day morning i added the flour and water and mix it. and this is how it looks like now so i would like to ask you.
Is my starter ready to use? Does the starter needs to flow on the glass of water to be fine or it does not matter? And most of all is it healthy?