bird mcbride
Well-Known Member
My rocks get 100's of gallons of water flushed through them every week. I use cloth filters and two sediment traps in my system. I do sterilize with heat if there is an untreatable problem. In an F&D lava rock system, as long as the system is kept from contamination it will keep itself clean if it is plumbed properly. It is ok to have some root mass left behind when cropping and replanting but I prefer to get as much as possible out. I find that if you give the plant short quik little pulls when the table is flooded it will remove most of the root mass from that plant. Any remaining root mass will simply rot and become compost which will eventually get into one of the sediment traps.