go with the 30 gallon!!
more gallon,and wider for more space to swim.
25 gallon = tall to put hands inside or very high water lvl and less space to swim!
1 RES- Bought for 10$ at Florida,Orlando
1'5 inches- "SmallZ"
It's hard to tell how old they are unless you actually saw them being hatched. For gender (boy or girl), you have to wait until they are at least 4 inches in shell length.
My babies: Tanner (RES), MR. Prissy & Ringo (budgies), Shinju (cockatiel)
"Little dudes are just eggs, we leave 'em on the beach to hatch, and then — koo-koo ka-choo! — they find their way back to the Big Ol' Blue"