I finished my new goldfish spray bar last night and it works great. You can adapt this to fit your length tank - this size would work well for a 48 inch long aquarium. The bar is made from a 34 inch long piece of schedule 40 pipe, with a push on end cap, and 90 degree joint. There is also a 2 inch piece of pipe at the top of the joint for the fluval rubber cuff to fit over. I did not have to use any sort of glues as everything fits together quite snugly. I used a 1/4 inch drill bit and placed 16 holes on the front, 2 inches apart. On the back I used a 1/8 inch drill bit and made 15 holes ...between where the holes on the front would be. I used all hand tools as it was too cold to go out in the garage for the miter saw, but that would have worked better to cut the piping. When I angle the large holes slightly upwards it creates good surface movement for oxygen to get into the water, and the 15 smaller holes at the back release a lot of the extra water pressure towards the glass and slightly downwards so the goldfish aren't being blasted anymore. I used some of my daughter's clear silicone hair ties to anchor the end of the spray bar to the filter intake and find this works much better than the suction cups I used to use. Also made a nice tower in the middle for my petricola catfish to hang out in, and they seem to enjoy it now and switch between the different levels.