by Maggie Kavanagh
(Calgary, Alberta, Canada)
Thank you Rick for sharing your Hydroponics mini Videos. All I could find was your first one and the 5th update, but nothing in between. Please provide if you have available. Also in your 5th update where you used the pebbles instead of the rock wool, did you have to cover the pebbles to prevent algae or did the ebb and flow system eliminate that issue?