Snowflake eels and LYB slider turtle question?

ok i was wondering if anyone knows anything about SFE breeding *i know it is EXTREMELY hard and expensive but it is purely for study not practice* any link that has any indepth info would b vry appriciated ..... also my GF has 2 L yellow belly slider turtles, one is quite big now slightly smaller than normal fist size and the other is a baby, i have heard that the babys need more frequent feeding and the older ones should not be fed as often but she is feeding them both atleast 1 time every 2-3 days contrary to my warnings but my question is will that hurt the older one*Harvey* *as my info came from a less than trusted source IMO* BTW yes the name is from batman :)