They need lots of sunlight. Maybe still not enough indoors. Any obstructions (trees or other vegetation, curtains...) will make light 'indirect'. I think that spots may have started as mechanical injury; but check 2 bigger ones if the leaves or spots themselves are soft. If there is a scab over, it should be OK. Otherwise, maybe even remove those leaves. Make sure the potting mix is thoroughly dry before every watering; use bamboo/wood chopstick or skewer or even pencil to test deep inside the pot. Bottom plant doesn't look that great - hopefully only because the protective powdery coating (often referred to as 'farina') seems to be rubbed off. Try handling the leaves as little as possible. Check the leaves if they are soft/limp - they should be quite turgid. IMO, it needs more light. If you have access to any outdoor space, they would benefit being there - but do not put them into sunlight suddenly or they will burn. Outside light is more intense and plants should be acclimatized. Can't tell for sure how low is the soil level in that pot, I like plants sitting higher so no leaves are really inside of the pot, if possible.

I don't believe it is oedema. I don't think it is sunburn either - but possibly. At least on first plant. Ppl posted photos of similar damage, and it is likely caused by something chewing on it while still younger. Those 'bites' have scabbed over. As the plant grows, rosette opens up more and damage is more visible. You can see it is sort-of regular. Very young growth is usually most juicy/succulent, and it is often first to be chewed on. One doesn't have to see the bug or pest for it to happen...and just because other succulents were not damaged, it doesn't mean it didn't happen to this one. I actually witnessed this to happen. As Dominyka said, those leaves will eventually grow out, and plant will look better. April If you don't mind here is a suggestion: hope those metal tins have drainage hole(s). If not, they should be drilled or poked in. And if possible, top up the potting mix so the plants are not so deep inside of them. Metal heats up more than terracotta (didn't compare it to plastic); and plants are even 'hotter' if they are deeper inside. And it restricts air circulation too.

HU Keeping plants inside and putting them outside for few hours/day is a mistake: They are in lower light most of the day, and then you expose them to direct sunlight. It looks like sunburn to me - I have same plant as yours #1 and even keeping it in - what I assumed was only "gentle" sunlight for few hrs a day and shade for the rest, I still sunburned it. I usually do not do that, but some plants are bit more sensitive than others. IIRC, it was mentioned many times to keep plants outdoors - if available - all the time, making sure they are acclimatized. Some basic rules for succulents: using fast draining potting mix, containers with drainage holes, not overpotting (no need for oversized pot), good air circulation, acclimatization, cleaning roots of old soil when repotting...I am sure there are few more. If there was mold-fungus growing on bottom of your pots, they are either full of wet soil or sitting in a saucer with water (and that water will get re-absorbed back into soil).

My Buddha's temple had been growing well for a while, then I lost my plant care diary and all of a sudden these nasty brown spots appeared on the pups! What is it? Will it get worse? How do I mitigate it? Have I scared my plant for life? Will it now die? Please help it's my pride and joy.https://www.pinterest.com.au/pin/639792690801410124/