On a few of my customsers lawns, they have small random spots where no grass is growing. I would like to hand aerate and hydro seed these spots. The reason I want to hydro seed the spots is because I have read that when you hydroseed, you are seeding seeds that are already germinated and dont need the customers frequent watering. If this is correct, do you have to leave the seeds soaked in water for a specific amount of time before they germinate? Also, Ive looked at different pictures of different types of grass and I just cant find the difference in person. They all seem to look alike. The only grass I have noticed is centipede. What are some tips or some HIGH DEFINITION pictures that can help me see the difference?