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Need some help planning this 80-gallon tank and integrated the sump shown below please. So far, I've drilled this tank for the 1600gph overflow. Now I need to decide whether to run two return lines or just one. The 3rd picture is a 3/4" Locline dual return nozzle. I'm trying to decide before I drill the bulkhead again for the return if one is sufficient or if I should run two set. Once near each end of the tank. I want to be adequate, but I also don't want to be overkill. I also have a Cascade 1200 canister to run in conjuction with the sump. I'm all open to constructive suggestions and criticisms.

Thanks folks!



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I run 2 return pumps on both my tanks. I don't have to run the pumps full on and I like the wiggle room 2 give me for adjustment. I run my returns over the top though, so if I had to drill I may think differently. I use silicone tubing with DIY spraybars and it works well for, me anyway.
 

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I don't have a great answer to your questions, but I can share my personal experience. I have a loc line Y output on my sumped 20 long and had a hard time getting proper flow distribution in the tank. I ended up having to drill holes along the front to turn it into a spray bar of sorts. If I were to do it again I would probaly go with a spray bar along the full length of the back wall. I also have my return run over the top since I shattered the back wall of my original tank that had a drilled return while trying to undo a stuck union. However, the glass on 20 longs is very thin and I would think the thicker glass on an 80 gallon would be more durable.
 
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