Im starting my first hydro grow using the bubble bucket method. Im very new to the idea of hydroponic growing and introducing nutrients directly into the water. After doing some research i have a few questions. When germinating the seeds i know that i need to start them in a medium like Rockwool but are there any special methods that will help in the success of the seedlings? When it comes to nutrients what are the best choices? Finally, do i ever need to change the water in the buckets? And if so how often during the grow?