When I first started hydro, some 5 years ago, I tried a version of EZ cloner. What I found was running the pump 24/7 resulted in poor quality root systems. Put the pump on a deep cycle timer running < 30 seconds on/~ 3 minutes off and see what happens. Personally, a simple DIY bubbler with ample air stones works great, but since you already own the cloner, buy a deep cycle timer
Also maintain water level at bottom of net pots, or if using the grommets, within ~ 6"- depends on volume of lp pump
hth