So I have only so far acclimated my nearly two year old lophs to regular air quite some time ago now. Its was a fairly lengthy process. They were also my first cacti ever from seed. Now I have two sets of newer lophs, bridgesii, Peruvianus, pachanoi, and a hybrid trich all going at the same time. They are getting sizable now. I was wanting to know when you guys determine its time to acclimate them. Is it more by size or by age? When I did my first lophs awhile back I think they were six months or older before I tried acclimation. It worked just fine but this time the soil is growing more funky stuff on it and what not. I want to get them acclimated before rot might kill off some seedlings. All current seedlings are good sized but pretty young at this point.