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Old 09-06-2007, 12:40 PM   #1
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Quick Question

I want to have 4-3/4 returns, two for each overflow. What size of a hole and bulk head will I need for the drain? Thanks!
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Female Naso "Isabell" or "Izzy", Emperor Angelfish, Flame Angel, Red Sea Sailfin tang "Bambi", Maroon Clown "Nani", 5 Chromis, 1 Aglae Blenny "Bengi" , Yellow Watchman Goby, pr of Banggai Cardinals, Lyretail Anthia, Six Line Wrasse

1 cleaner shrimp, Coral Banded Shrimp, lettuce nudibranch, 1 sand sifter stars, 1 tiny red brittle star "red", 1 tiny red and white banded serpent star, 2 tiny banded serpent stars, small orange Linkia starfish, assorted hermits and snails. Corals: star polyps, A ton of different types of mushrooms, yellow zooanthids, brown-orangish and light blue paly's, orange ricordia.

90g RR, W/D, 120 lb's LR SF eel, pygmy angel, pr sebae clownfish, 4 chromis. Star Polyps & Mushrooms
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Old 09-07-2007, 05:59 PM   #2
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Old 09-07-2007, 09:42 PM   #3
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If I read this right, you are planning on having 4 3/4" return lines into the tank and are asking what size drain you need? I suspect that the drain size depends mostly on how much flow you plan on having into the tank. It seems that the bulkheads I have found for my project are 1 1/2 max.

What size pump(s) are you using?
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Old 09-08-2007, 12:18 PM   #4
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Well, I'd like it between 1500-2000. I know that a bulk head of 1.5" will give me about 1500 and a 1" bulkhead will give me 500-600 max right? The tank I am going in to look at today is a 240 wide with the overflow in the middle. They are going to order me the same tank to my specifications if I like it. I want the max flow rate I can get so it eliminates the use of powerheads. I have never done this before so I am a little worried about requesting the wrong thing. I'd basically wanted a want each corner of the tank covered with sufficent flow without using powerheads. However I can do that is fine with me.
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Alex n Mary

150 gallon, 30g fuge/sump, 4.5 watt/gal VHO Lighting, 4" sand bed, 290 lbs LR, CDX-3 Nitrate/Phosphate filter

Female Naso "Isabell" or "Izzy", Emperor Angelfish, Flame Angel, Red Sea Sailfin tang "Bambi", Maroon Clown "Nani", 5 Chromis, 1 Aglae Blenny "Bengi" , Yellow Watchman Goby, pr of Banggai Cardinals, Lyretail Anthia, Six Line Wrasse

1 cleaner shrimp, Coral Banded Shrimp, lettuce nudibranch, 1 sand sifter stars, 1 tiny red brittle star "red", 1 tiny red and white banded serpent star, 2 tiny banded serpent stars, small orange Linkia starfish, assorted hermits and snails. Corals: star polyps, A ton of different types of mushrooms, yellow zooanthids, brown-orangish and light blue paly's, orange ricordia.

90g RR, W/D, 120 lb's LR SF eel, pygmy angel, pr sebae clownfish, 4 chromis. Star Polyps & Mushrooms
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