Im getting a 4' long 33 gallon tank saturday.. It's pretty much free as im trading some zoas for it *thumbsups .. It's 48x12x12 .. Going to have to build a canopy for it, just finished the 1 for my 29 a few weeks ago not it's going to waste .. Im guessing im going to have to move my lights way up since the tank is only 12" ? I have 2x175 mh.. How far above the tank would you suggest putting them?