i noticed that brachys are easier to sex than grammies because at 1.5 inch i can already see the spermathecae of brachys with a hand lens. But in Grammies at 1.5 inch i don't see anything at all. Am i right? and for what i remember, i have read somewhere that brachys develop their spermathecae at a young age. What are your observations? please share