It takes A LOT of energy out of the female to lay that many eggs - - it is a very stressful and tiring ordeal

She has to carry the male around, deal with his forceful squeezing, expel the eggs...it is a huge undertaking and is the reason why females should never be bred more than 3 to 4 times a year. After breeding, most would separate the female out into her own tank away from the male so she can relax with out having the male pester her.