Veronica, the red spots on your sux is normal for us...a type of "freckling", for lack of a better term. The plant will look different through the year. Greg, I believe both you & Veronica have Sedum nussbaumerianum. If it were Sedum adolphii, the tops of the leaves would be flat with a more defined edge (with rounded underside). Here are several pix of my S. nussbaumerianum at different times (some diff plant), some with the freckling, some with California tan. =) Click for larger views:

Just thinking detective style. You showed us the gorgeous basket of healthy plants. Did you buy/obtain them and brought them home in the basket? Now all the plants that were in the basket (except the Jade) have this "malady". Then there are over 50! plants with the same malady. I'll assume a bit here until you correct me. You have a large collection of Succulents, so a pretty experienced succulent grower. All plants are ok. Then you bring home a basket of Succulents for a group planting. A week after replanting, the malady appeared on some plants in the planter, then on the others (except for the Jade). Within the next few days, over 50 of your entire collection has this malady. There has to be a connection... Same growing conditions causing malady to many plants? eg Oedema. Insect and/or lavae/eggs came in with basket? Something originating from the planter? eg something left from previous plant/s. Anyway if you're interested... could you rewrite the "happenings" correctly and with as much detail as possible. Eg I bought the new planter from bunnings or guy next door gave me the planter when he moved 3 weeks ago. First sign of malady- day/month time I noticed on #of plants in planter. If your not interested, that's cool. Also wondering if you’re into the fast draining gritty mix that rina was talking about. I use it now. Incredible difference in the plants health, not being stuck in unnatural cloggy dirt. BTW What general area in/around Sydney are you in. I spent a lot of time going to Richmond to stay with a family friend during her last years. She died, content, about 2 yrs ago. I would have been visiting about 3 years, several times a year. She was like everyone's favourite Aunty when I was a kid. Sorry that was just why I was interested lol

I do not know what bad reaction to some sprays looks like, but it is possible. Are the spots only on plants that were sprayed? - that would help to indentify the origin. There are just too many spots. If it is reaction, leaves may dry up and die, and be replaced by new growth. Or they may stay, just look bad until replaced. Just like in humans, it is best not to overreact and spray plants just to kill possible bugs. It is very important to know what causes damage, if any, and use appropriate treatment. Many natural predators would be killed by some sprays, and they probably could have get rid of few bugs. I am not trying to preach, but a warning. I agree with cactusmcharris about soil: succulents should be potted in fast draying potting mix. Adding sifted perlite is simplest way to improve drainage. Decreasing organic mater helps - many bugs feed on decaying organic matter. It also retains water, often for too long. And if wet, it could harbor fungus too. Making sure containers have drainage hole (can't tell if yours have or not). Good air circulation helps a lot, especially in hot and humid climates. That is sometimes more difficult to maintain.

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/