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Old 07-31-2010, 07:35 PM   #1
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PVC overflow (??)

ok, I'm learning all I can before I start my "big build" this fall/winter so I'm setting up a sump for my 29g just to see how the plumbing all works since I want to do a lot of my build as DIY. I went to ACE (local business) and bought 1/2" PVC (have no idea is this is big enough), elbows and a stop valve. And yes, I had to have the handy dandy PVC cutter since I love tools and thankfully my husband shouldn't find any need to "borrow" these cutters, lol.

So I pulled up several youtube videos and a thread I found in another forum (shhh) and started cutting/fitting and came up with what I "think" will work. Found out that I'll have to pick up a couple more parts tomorrow when I go to town for groceries. I forgot about the T that will have the shut off attached. Also, have to pick up a check valve, needed to suck the air out of the overflow to get the siphon started. And an end cap, I think mainly because I looks cool (??)

Now that I've started putting this together, knowing I already have to get more parts, I'm wondering if I can also build an overflow for my 10g that sits on top of my 29g, and have it flow into the same sump (20g). I'd like to connect the overflows of each tank so that it's only one pipe entering the sump. Is that possible?

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Old 07-31-2010, 07:38 PM   #2
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Oh, and check out the sand wave in the 10g. My yellow tail damselfish rearranges almost every night
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Old 07-31-2010, 07:46 PM   #3
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yes i believe it is possible. you hook the 2 pipes into a y then you have just one pipe into the sump. not sure about the return you might need 2 pumps i am not 100% sure.
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Old 07-31-2010, 08:03 PM   #4
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yes, you're correct about the return pumps, pretty sure there's no way to join that, but thought that it should be possible for the overflows to join. So now I have two votes "yes"
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Old 07-31-2010, 09:20 PM   #5
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What size pumps should I get to carry water back to each tank?
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Old 08-01-2010, 11:27 AM   #6
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around 10x dt volume.
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Old 08-02-2010, 12:36 PM   #7
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That actually varies, I have heard opinions anywhere from 8x-20x turnover rate. It depends really on what you are planning on keeping. 10x is fine for FO, just enough to keep their water filtered. If you want SPS and other high flow corals, closer to that 20x might be better.
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Old 08-02-2010, 03:26 PM   #8
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Keep in mind that the 10x and 20x turn over rates will not all come from your sump pump. The sump pump will provide a portion but more likly you will need to suppliment it with power heads in your display tank to get up to the higher flow rates.
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Old 08-02-2010, 06:46 PM   #9
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Quote:
Originally Posted by Jimbo7 View Post
That actually varies, I have heard opinions anywhere from 8x-20x turnover rate. It depends really on what you are planning on keeping. 10x is fine for FO, just enough to keep their water filtered. If you want SPS and other high flow corals, closer to that 20x might be better.
I would have thought 10x is plenty for any type of tank from a sump as long as power heads are used as well to match the type of tank you are running;
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Old 08-02-2010, 07:19 PM   #10
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I believe you will have to put a valve between your pump and the 10g to regulate the water flow into the 10g. So you may get away with only one pump...a little larger one.
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