Need pics to ID a problem, it’s an almost impossible task without, you will only get educated guesses, which can sometimes be wrong....despite how good we all are! Sounds like overwatering is causing rot....but that’s just a guess!

Gill

At least for the top pic, it looks like the problem is spreading to all of the leaf tips. Very well could be over watered. When was the last time you watered it?

Over the weekend. Before that it had been a few weeks since they had been watered. I've been watering my tropical plants every week but not the succulents. They've had the orange bottom leaves for several weeks now. That aloe leaf tip is actually the closest one to the light so I didn't know if possibly it had gotten too hot.

Can you describe how you water your succulents?

Are they both in gritty mix? Your flow looks like it may be rotted at the stem, can you confirm if that's the case?

No they're not in gritty mix. Flow probably looks weird because over the summer it was knocked over several times while it was outside, so some of the potting soil has been knocked out and I never got around to replacing it. The stem isn't mushy.

To determine if they need watering, I lift the pots to see how heavy/light they are. They usually need watering when I do check because I have a tendency to forget to water them. When I water I go through and water each plant until water comes out the bottom. When I'm finished with all the plants then I go through and dump any remaining water out of the saucers, starting with the first plant that I watered. I frequently also lift up and tip the pots before I dump the water out of the saucers to make sure that all the excess water has drained out of the pot.

Deanna

Could the leaves just be old? Has this happened before? If you've had it for a long time, then yuo'd already be familiar with that and you can disregard my guess. Sometimes newer Echeveria owners get concerned when that happens.

I am wondering if it could be sunburn if these leaves are closest to the light.

I've never had them turn weird colors on the bottom row of leaves before. One time when I put one of my aloes in too much sun at once it got sunburned. That's what I figured was going on with the leaf tips, but the bottom row of leaves coloration has me mystified.

Deanna

Are these under artificial light or in a window for sun? Try to observe where the light hits the plants. It could be hitting in unexpected spots.

Also, are the orange leaves limp or firm and crispy? I am thinking based on the curl of the leaf tip on the aloe, it could also be underwatering.

I remember seeing this a few weeks back. similar looking leaf tips if you want to compare...

https://www.gardenweb.com/discussions/5113408/does-anyone-see-anything-wrong-with-this-aloe-vera-plant?n=15