Kratky Bell peppers

Just seeking some advice how are the roots looking on this? Also I've been using Flora grow three-part system. Just curious what the nutrient mix should be during this flowering stage with bell peppers on it? Thanks! Also not running an air pump at this point you think it would help? I've been replacing it with 2 gallons of nutrients a week in the bucket it's in. Any and all devices appreciated be kind of a newbie lol