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Weir drain hole sizes

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Right, hi guys, I am new to the forum but not to fish keeping, I am however fairly new to marine having bought an established tank years ago that was riddled with algae problems that I couldn't get rid of.

I have just purchased an acrylic tank for my new setup which I will be building into my false wall, the tank I have bought is not drilled but I am wanting to use a sump. I will be drilling the tank, being acrylic it will be fairly easy to actually drill, what I am unsure of is the size of the hole/s I need to drill for the standpipe/s.

I am thinking of using two weirs, 1 in each corner to eliminate the problems of blocked outlets etc. The plan is Each weir will have a standpipe to just below the waters surface with a t piece on top with one side of the t piece out the water and the horizontal piece below water level, have read this will reduce noise?

My question is, what size do I need my standpipes to get adequate flow.

The tank size is 51"x24"x20" (WxHxD) I don't have a sump yet but plan to go as big as I possibly can that will fit underneath the tank once I've built it.

Happy for any recommendations on the setup aswel.

Cheers

HK_Fuey

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Reply #1

Mine is 40mm
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reeferjoe

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Reply #2

Hi Rodg, what do you mean put a t piece on the end of the drain. Im soon to be doing exactly the same as you and drilling a 4ft acrylic tank for two drains at the back. Im a complete newbie and like the idea of the quieter drain . Dont suppose you could draw a pic of the way the t piece should go to make it quieter could ya.

Gav

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Reply #3

Have you looked into the 'herbie' overflow , perfectly quite and will handle a lot of flow .Herbie Overflow Plumbing Guide for Quiet Reef Aquariums - gmacreef

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reeferjoe

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Reply #4

Never heard of it , the only Herbie I know is a love bug with attitude. Thanks for the heads up im going to investigate this herbie drain right now.

reeferjoe

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Reply #5

Are durso standpipes ok if i use two. I like super simple prefereably  :D


Asco1104

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Reply #6

Are durso standpipes ok if i use two. I like super simple prefereably  :D

It will be noisy, the Heriberto system is tried and tested and works very well and once dialled in is silent


Tim

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Reply #7

personally i would go with a single weir but use a herbie or beananimal overflow design. i currently have a twin weir durso setup and although i have got it near silent it has taken alot of work and effort which the other designs dont need.

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