Sexing Reticulated Hillstream Loaches

[April0617]

Anybody have experience with this who'd be able to give me some advice? Google has given me some pretty good info and I think that I'd be able to tell the difference between male and female adults, but the ones I have are young, they are just hitting about an inch now, so I'm wondering how early I should be able to tell. I definitely have some that look more male or more female, but I don't know if that's just because some are a little bigger/more mature. Any estimate on what size they need to be before I can make an educated guess? I currently have six and would ideally like to bring that number down to three.

[Fish Folk]

Here’s the most helpful info I could find. I’m not sure how long they take to reach sexual maturity.