1. I keep my seeds in one of those flat fishing tackle boxes, it's kept in a dark area with silica packs to ensure there is no moisture - I've popped 4 year old seeds. I've heard of seeds being kept for 9+ years with a 80% success rate.

2. I've heard of 9 generations before. However, if your smoking the same strain, you won't reallly notice a drop in potency as you'll get used to it generation after generation. I only do 3 generations because honestly, 3 generations can go on for 4 years+. I keep my moms for about 3 months before they're chopped in 1/2, then they're good for another 3 months or so before they turn into a tree - At which point, theoretically I COULD chop them again in 1/2 sticking with the F1 strain.

3. Recirculating DWC, its a pure hydro system that allows me to flush/fill rather easily. Mine consists of (5) 5 gallon buckets (about to be 7) that houses 4 plants, and then 1 bucket is my control bucket (houses the pump and allows me to check/adjust the PH of all the buckets with ease)