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I am trying to do some research and figure out how much a 125g tank would cost. I have seen some decent deals on craigslist, and I will be buying a used tank. My dilemma is equipment side. Should I use a sump or use a canister? I will be sacrificing my 55g tank and probably go low-tech. I like the idea of a sump, it seems quiet (with the right overflow) and I can easily hide equipment in it. Also, if I design it right, I can probably use co2 and not gas off a ton of it. I am conflicted because I have no idea how to go about building a sump. I dont know what size tank to use, and what return pumps are good. Canisters are simpler, but I would probably get an fx6, so it may be a little cheaper for a sump. Also, what kind of lighting would be good? I have a 4ft ray 2, but it probably will be too bright for what I am planning. I want to do a nice scape with lots of plants that can be planted on DW, as I want to keep geophagus, probably 6 or 7 or the red head tapajos. I don't like anubias, as they are too slow-growing. What are some good plants for this type of setup? I also am on the fence about substrate, PFS or BDBS? I don't know which would be better for the geophagus, as they sift the substrate. I also want to do a group of fish that are smaller than the geophagus, but add some movement to the middle of the tank. Any advice would be appreciated.
Also, how do bulkheads work? I can't figure it out. Do you screw the PVC onto them? Or is there some way that I am missing?
Also, how do bulkheads work? I can't figure it out. Do you screw the PVC onto them? Or is there some way that I am missing?