I had a very low canopy on my 75 (came with the stand). I ended up cutting holes in it and mounting my halides in those holes (vho actinics still in the canopy, but not under the halides). I then built a box to cover both pendants, and to hold fans. It's a makeshift unit until I can build the canopy that I want to hold everything. It's a hassle to get into the tank, because the whole top has to come off. Do some searches in the DIY forum, and you'll see lots of plans for canopys housing pendants. Good luck!