Sorry to hear about you two slings Rumor . . I dont think its any thing you did .unless all your other Ts start dieing then some thing else is going on wich they not . I had 4 slings die on me over the last year and bit I had 2 C crackwi die a week apart and an G rosea Rcf just died and my father leg baboon (cant think of the scientific name sorry not at home ) also died suddenly all the Ts wore eating fine and nothing look out of place with them they wore webbing and burrowing and it was in summer . So i think its a unlucky two Ts you got .