Yikes, that looks pretty serious. Were it mine, I would move it away from the rest until I knew what was up. Since it's not yours either, you probably don't really know its history or how its been taken care of.

I have my theories but Im going to wait for Siri to weigh in. She knows all this stuff.

Looks like you've got mites. Use AVID, it helps.

Irina, are you there? Agreed with me?

Polina.

Where do you get "Avid" I see it online for quite a but if money but it looks like its only sold in large amounts?

It's expensive, but you can buy 8 oz bottle. Maybe Amazon.

I bought a small amount of it off fleabay a while back. I did three treatments over the course of a month or so for 4 or 5 dozen plants. I think I paid less than $30, I still have more than half left. Well worth the price since it actually works.

I will put in a plug for using Forbid for mites. One treatment is all that is needed. Hmmm, your plants don't look quite like a classic mite attack to me, more like a toxic burn, but you won't know for sure without a scope to check for the little buggers.

I do not think it is bugs, I think it is culture. I am pretty sure about Frozen in Time that it is not bugs. The second is less clear.

Frozen in Time looks like it was overwatered at some point. The soil on both plants is very fresh - they were recenty repotted. Soil looks like it came from a Miracle Grow bag - so it is preloaded with fertilizer. Frozen in Time has blossoms all over. If you repot and disturb the roots - you need to remove the flowers. My feeling is that it is a repotting stress - may be too much water after repotting.

So it looks more stunted than damaged by bugs.

Having Forbid on hand is a very good idea. You can get a small amount on eBay- 1/4 oz is plenty - I am here with Terrilou - one treatment is enough.

Mites do not come out of the woodwork. They come with new plants - purchased, shared etc. So if nothing new was introduced in a collection... fine.

If you bring something new - you can always make a small amount of Forbid solution - and spray it. Saves the trouble in future.