After going back and forth between a Neptune Apex and a Profilux 4... I decided to pull the trigger on a Profilux 4 Megaset and a Doser 2.1 4 pump slave.. In the past I ran an Apex classic on my old 210 and had a few little glitches that kinda irked me. After reading tons of reviews , it seems GHL has the more stable system .. Looking forward to it ! Setting it up on my frag system , then will purchase the expansion and required items to run my new tank that is in design/build mode currently.. Placed my order on the GHL USA site so hopefully it’s all in stock ..