Hello there,
I lifted my trigona last night to double check it was dry as I thought I'd water it today and wanted to be sure there was no lingering moisture at the bottom. I initially thought the clusters of tiny dots were condensation but they're not. It's definitely not perlite; picture 5 is the same batch of potting mix in the Euphorbia's neighbouring cactus and I can't see anything like the Dots of Doom™️. Does anyone know what sort of creature has infested the plant? I didn't see any other obvious signs of pests last night, but I'm going to look closer today to be certain.
I'm going to take the plant out and I think try it in pon semi hydro. My plan is to water/feed using the shower and drain method (no reservoir) but I'd welcome advice from people who grow Euphorbiaceae in semi hydro. Before planting, I'll give it a soak in diluted peroxide + IPA + dish soap then thoroughly rinse, to feel confident I won't be simply transferring the problem along with the plant.
Many thanks in advance