I’m pretty sure I have a female, my brother is giving me his 40G breeder. I just have to clean it out and buy the filtration and a lid.it's dollar per gallon until 29g, then 50% off after that, so 75g is 80$. I work at Petco, and this is a nation-wide sale.
Personally feel that a 40b would be fine for a female but cramped for a male JD. Have seen some large bulky males before.
I had just bought a 75 gallon tank from someone for $180 because my petco never has 75 gallons in stock. Literally NEVER but when I went to buy my JD they had some and it kinda made me mad. I have been searching for a 75 gallon tank for like a year and when I finally buy one they have it on the dollar per gallon sale but I may pick up another one just for an Oscar. I’ve always wanted one.