its a glass tank...and i have the powerhead pointed running across the back and then it basically goes in a circle around the tank...i pointed it that way in the first place for the hard coral i have on the top...which way should i point it? and idk if there are many more options in my tank (rock-arrangement wise) do you really think if i were to go rearranging my rock etc i wouldnt hurt any of my fish? i have a sailfin tang, lawnmower blenny, clownfish, 3 turbo snails, and 3 other sandsifter snails. how would i go removing my pulsing xenia from the rocks? how would i reattach them? my rocks are mainly large...i have one GIGANTIC rock that is the shape of a "W" or a "M" , and 5-6 other large peices...when i set up this tank, i spent 7 hours or so arranging the rock.... so i kinda dont want to go moving it because i dont think their are many more options...what can i use to scrub the rock in the position their in now? i would like to scrub the rock where they currently are and not have to remove them. so i will get some phosban. is their anything else i can purchase that will help? where will i put the phosban? ontop of my bioballs? also, i need to add some sand...can i just scoop the sand in and dump it (gentely) ontop of the current sandbead? it will be going ontop of that algae....should i add it then just mix it up with my hands? thank you!