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what do yu thik the safes way to get good seeds woud be

thanks, dude i was startin to sweat so the styrofoam and the net pot should fully be in the water not stationary?

You should cut the Styrofoam so that it can move up and down as the water level changes but is tight enough to keep light out. And for the netpot size I would go with 5 inch. You should get some rockwool to start the seeds with and some hydroton to fill the netpots with.