starting a new grow soon ,i am considering changing to a differrent medium as when i get a problem with blockage or whatever its a pain in the ass to fix anything.i have 3/20litre pots iside 3 more with a flood and drain system,under 3 1000 w sunmasters i am currently getting a lb or more to a plant but i am looking for a more managable system eg if anything goes wrong or they have to be moved while repairs are being made. any input thanks people.