Please excuse my astronomical lack of knowledge on these two subjects. Pun intended. The two seem to be somewhat similar. Einsteins model of gravity describes space time as a fabric but it seemed to be easier for me to visualize if the properties of space time were more like a fluid and the spherical shape of an object in space to be more like a bubble in that fluid giving the model more of a 3 dimensional property. For me anyway it is easier to do thought experiments with. I was wondering how similar these two concepts are and is it relevant at all to look at space time as having a fluid like property that has surface tension?