Beakons do not produce lime when able to fertilize flue corals.

When you ranch beakons and flue corals together, the beakons will automatically fertilize the flue coral with lime. It's a great way to avoid needing extra dupe labor or automation, and the animation is cute. However, if you have extra beakons in the ranch beyond the 1:1 ration you need for corals, they will almost never excrete the extra lime. As you can see in the image below, I left the ranch running for about 30 cycles and got almost no lime in the conveyor receptacle collecting it. I uprooted the corals and they immediately began dropping lime.

It's not the worst problem as is. You simply have to design separate ranches for oxygen production and lime production. Still, I imagine many players will be confused about why they don't have the lime they should be producing.