)
I have three ponds in the caves. Two for actual production and one because for some reason I can't help but collect every puddle slime I find. Occasionally the game bugs out and the holding pond with dozens of them produces several dozen plorts anyway. That's always nice. As for the [spoiler]||quantums,[/spoiler]|| I've got about 50 of them, unmixed, in a cage down on the docks with two lemon trees and some drones on automatic feeding & depositing duty. I check in from time to time, suck the trees dry, refill the feeder and shoot the rest directly into the cage. I'm rarely there long enough for any of them to [spoiler]||teleport[/spoiler]|| out.
Fortunately space isn't at nearly as much of a premium as it seems. As long as you make sure you don't reuse slime types when mixing them, you're left with plenty of extra plots for food and silos.