I recently started my tank and finished the cycle (yay!) with 100% of my rocks and sand coming from an established aquarium that was 5ish years old. I have a 2100 gph wave-maker, two 825 gph heads, a 300 gph canister filter and a second filter that is 525 gph. This is not counting my 225 gph protein skimmer that has yet to be installed. At first I did not think much of this amount of flow or the 20x rule as I had heard the more flow the better. I assumed that the manufacturer ratings would not pan out in real life and all would be good, especially since I had much of it directed up for surface agitation. However, after I got it all installed piece by piece as it arrived in the mail (not the skimmer) the sand was getting pushed around in places. I've since unplugged one of the 825 gph power head. The sand is no longer moving but my question is if I should plug it back in and let the sand move until it becomes settled? The sand bed is 6-8" deep so I would assume it would settle on it's own after making some interesting looking dunes but did not want to take the chance until after I had consulted others. Also on a side note, could my three week old tank support a torch? It is the coral that got me into the hobby years when my parents said I had to get a freshwater tank. Needless to say it fell short of my reef minded expectations and I eventually lost interest.