Until the a large amount of the roots hit, I would do that. Your net pots are setup identical to mine, all I strive for is to keep the rocks moist which keeps the rockwool moist until the roots are established. When I do not do that wilting is one symptom not enough moisture. My one attempt at RDWC ended up with roots clogging my return lines, not to mention the res took up to much space in my finite grow space.