You need to check the height with the correct water depth. I did not go with this one because of the operational depth which I believe was between 6" and 7". My depth is 9" in my sump so I would have needed to put it on a shelf and by doing so I would not have been able to use the auto neck cleaner. I do recommend the reef octopus as this is probably one of the best upgrades I made. They are so much easier to get dialed in and the auto neck cleaner lets me go up to a month without having to take it apart to clean it. I have my neck cleaner run for 15 sec every 2 hrs and this keeps the walls clean so there is not much buildup of waste to fall back into the skimmer.
By the way if you did not read my thread I have the reef octopus diablo 225.