well I'm not a breeder. But I can say with nitrate& nitrite should be at 0

hardness should be soft to moderate
And your KH 80-120
Ph should be 6.8 no higher than 7.5

Some water treaments like reptisafe drop your ph to acidic levels, you may have to buy ph up, but I don't know about eggs. There's a care sheet that outlines breeding stuff on the left colum