Frequency of Cycles
Being new to Hydroponics, I have gone out far & wide to learn all I can right away. One conflict I am running into is the frequency of cycles that should be done in an ebb & flow system. Currently I am running a 15 minute flood cycle every 3 hours, 24 hours a day. Now I read that flooding should not be done at night because the plants reverse their CO2 intake to O2 intake at night. I've seen no adverse effects to my plants with the current cycle I am running, so should I not worry about running, or not running, it at night?
Another question I have is...
Can rockwool cubes be recycled/used more than once? That is what I am using at the moment because that is what came with the starter kit I purchased from the local Brew-n-Grow. If they cannot be used more than once, then I cannot see using them to be efficient nor less wasteful. I'm thinking of switching to gravel as it seems to be easier to plant, pull, and replant in....although it would weigh much more.