An aloe plant I have on my table now has leaves with yellowish ends and I'd like to somehow address it. I Googled for a while and found that in case of aloe this may be a sign of either underwatering or overwatering.
The plant is about 120 millimeters tall with diameter about 250 millimeters, the pot is about 120 millimeters tall with diameter about 100 millimeters filled with ground almost to the edges. I water it once a week pouring about maybe 20-40 milliliters of water.
How do I know if I water aloe right? How do I know if I'm underwatering or overwatering it?