The frag system has been less fun that I'd hoped. Water quality has been an issue because it's just not as stable as I like. While skimming is hands-free as well as top off, dosing three part to the tank is an unpleasant task for me. I'm spoiled by my calcium reactor on the big reef, and would probably love one on this smaller tank. Mixing up the solutions, replenishing the reservoirs as they run out, making sure the parameters are on target or adjusting the dosing pumps to compensate for preferred numbers... not a fan.