Having seen the effects a couple years ago of crypto blowing through a batch of baby leopard geckos at the store I work at.... I really feel for you. I can't add much to the conversation, except for this. It was very difficult for me to get a clean diagnosis. Multiple fecals from multiple sick geckos turned up with almost nothing, due to the nature of the infection. I sent three in for necropsy and only one came back positive. We did everything we possibly could, both with medicine and with husbandry, and still lost all of them. I think the lengths you're going to are amazing and I hope you find the answers you're looking for.