Separate Sand and Water in Glass Vase Answered
I'd like to hear some suggestions for separating sand and water in a 4" diameter glass vase. I'm doing an arduino project that involves having a dyed deep blue mineral oil as a non-evaporating "water" atop about 4 inches of sand in a glass vase. I experimented with drizzling Loctite epoxy and it leaked about 1/4" into the sand, so it wasn't very elegant (created a layered look - dry sand, wet sand, epoxy, water). I'd like the delineation to be as clean, but easily implemented, as possible.
Worst case scenario is that I wrap something around the vase to hide the transition, but I'd like to avoid that if possible.
I suppose another option is to stack 2 separate glass vessels, but im struggling with thinking of a good way to do that too...
Perhaps this is also a non-issue...I should see if the deep blue mineral oil is even visible if put directly INTO the sand.
Thanks in advance.