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07/06/2017, 11:25 PM | #9426 |
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Hello everyone! I've been going through quite a bit of pages of the thread to try and find the actual overflow design but have only found bits and pieces of everyone's design and reconfigurations and such. Can someone point me in the right direction of the actual proven design that this thread is built around please? TIA!!
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07/07/2017, 08:59 AM | #9427 |
Either busy or sleeping
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Google "beananimal". first hit.
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Algae Scrubber Basics!!! GOOGLE "algaescrubber zoho" General Interest Forums --> Advanced Topics --> Algae Scrubber Basics (sticky) --> POSTS #3251-64 (Basics), #5206 (Cleaning), #6884 (LEDs), #729 |
07/07/2017, 02:04 PM | #9428 |
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07/08/2017, 08:01 AM | #9429 | |
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07/08/2017, 08:13 AM | #9430 |
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My advice is to study how a setup like this works, rather than just listen to 100 opinions and copy one. Then you can actually modify the design to suit what you want it to do, location you're in, or whatever you need. IMO, the basic idea behind the BA setup is this:
1) Siphon line with a valve to maintain siphon 2) Open channel for slight overflow of what's not going down siphon 3) Open Emergency drain, for the event something else fails. |
07/08/2017, 08:20 AM | #9431 |
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Here is my plumbing under the tank. "They" said it wouldn't work using a header like I did, and then running it to the basement where my pumps are. However, if you really understand the BA setup, and how it works, it's a no-brainer. It's dead silent. In this video, the TV is 30+ feet away, and the cell phone is about 5in or less from the water. Turn up your volume. Notice that I don't use any hoses in the overflow box. They are not necessary at all.
http://cloud.tapatalk.com/s/5932effe...603_131705.mp4 |
07/10/2017, 12:26 AM | #9432 | |
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07/10/2017, 08:08 PM | #9433 | |
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The holes are there to allow the U pipes to completely fill with water. If you didn't have the holes, water is trapped in the top of them, and it would take a HUGE amount of flow to push it down to the sump. If you've ever used one of the HOB overflows with the upside down U pipe, you know how air gets trapped inside it and then you can't get the same flow through the pipe. In this type of overflow (Bean animal), you are submerging the U, so you can drill a hole in it. In all reality, you can actually remove the elbow from the siphon line if you want, adjust height accordingly, and achieve the exact same results. |
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07/10/2017, 09:00 PM | #9434 | |
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I'm not sure why 'they' said it would never work - In terms of running silently, it certainly will/does. The main concern with your setup is that you have a single potential failure point (the common pipe for the open channel & emergency.) If you get an obstruction after the two come together then you will have a flood. I readily agree that this is unlikely, and if the risk to you is acceptable then fine, as long as you recognize it. The setup you have for the open channel (in inverted U with a hole at the top) is generally the 'recommended' configuration, with the height of the top of the U being equivalent to the height of the air tubing in the 'classic' setup that Bean described. When the water covers the hole, the pipe converts to a siphon in both cases. As far as the siphon channel goes, it should start up either with or without the hole. Either way, you have to have enough flow to flush any air down. I usually recommend just having the siphon channel open at the bottom of the overflow box. The main concern with that setup is that you have vortices form, entraining air into the pipe and causing noise or disrupting the siphon. That's potentially an issue with your setup, too, but doesn't appear to be with the combination of flow vertical drop and water depth you have. Regardless, you are right that understanding the physics helps immensely in setting up the system. The best way to do that is frequently to set it up and play around. Nothing like letting experience teach you - as long as you don't experience a flood!
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~~~~~~~~~~~~~~~~~~~~~ 120 gallon, coast to coast overflow w/beananimal overflow. Waveline DC 10000 II return pump, 40 gal sump, Octopus XS200 skimmer, T5 lighting |
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07/13/2017, 06:00 PM | #9435 | |||||
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That said, I think the possibility of a vortex forming would be greater as the "inlet" point gets closer to the top of the water. I think that is the point you're making, correct? Quote:
I really like this setup and would do it exactly the same if I had it to do over again. My last setup was a hang on style with siphon over the tank lip....never again will I do that. I had too many mishaps that resulted in a lot of shop-vac time. |
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07/14/2017, 09:26 AM | #9436 |
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Howdy gents and ladies....
Just got a new tank from glasscages with pre-drilled holes for a beananimal. Regretfully, they drilled the holes about an inch higher than the drawing I sent them. SO here's my question.... 1) What is the recommended (minimum) distance from the top of the emergency over flow to the top of glass? 1/2"???? 2) How much distance is required from the top of the emergency overflow to the top of the syphons?? Trying to see if I can make this work. 240 gallon tank. Internal weir. Thanks Mark |
07/14/2017, 05:01 PM | #9437 | |
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07/17/2017, 05:12 PM | #9438 |
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Amazing set up!
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07/17/2017, 10:29 PM | #9439 |
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07/17/2017, 10:35 PM | #9440 | |
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07/20/2017, 08:14 AM | #9441 | |
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Where do you have your gate valve relative to the trap? I’m having a hard time understanding how it runs silently since there must be air in the 1.5” section of pipe. Or is the total flow just low enough that the 1.5” pipe can still run quietly, even with the air? The trap is a neat solution, but not one that I would expect to work reliably across different systems, but again I can’t totally picture your setup. Yes, that's what I was trying to say about vortices. The likelihood of one forming depends on the size of the hole, the total flow, and the relative depth. I have a coast to coast overflow with downturned 1.25” elbows running about 1000 GPH. If the water level in the overflow is less than about ¾~1” above the bottom of the ells I start to get vortices and air entrainment.
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~~~~~~~~~~~~~~~~~~~~~ 120 gallon, coast to coast overflow w/beananimal overflow. Waveline DC 10000 II return pump, 40 gal sump, Octopus XS200 skimmer, T5 lighting |
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07/22/2017, 02:05 PM | #9442 | |
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If I put my ear up really close to the emergency line, I can hear some air movement, but that's with the top off the box also. My return discharge makes more noise than the overflow, and that's because I have them just slightly above the water level. By doing that, it creates surface movement for a nice shimmering of light, and it also makes sure I don't siphon back out of it when power is off. I know there's other methods to do that, but I wanted to limit the amount of water that goes back to the sump (with powr off) as much as possible. |
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07/24/2017, 06:11 AM | #9443 |
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07/24/2017, 07:24 AM | #9444 | |
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Most folks have the valve closer to the sump.
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120G Mixed Reef, 28G AIO zoa/pipefish tank |
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07/24/2017, 07:42 AM | #9445 |
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07/24/2017, 01:49 PM | #9446 |
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Hey guys, I'm going with a bean setup on my new build. Wanted to run post my plans here in case there are any errors or improvements. Tank is 50G with internal overflow and 3x 1" holes. I'm aiming for about 500gph flow, so 1" should be fine. Return will be over the top. Here are some sketches:
Tank view Sump view I haven't seen too many examples of internal overflow beananimals, is there a reason for that? Also, is there any reason to have a cap on each standpipe instead of just the U? For cleaning? |
07/24/2017, 05:08 PM | #9447 | |
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"Things should be made as simple as possible, but not simpler." (oft attributed to Einstein; most likely paraphrasing by Roger Sessions; compactly articulates the principle of Occam's Razor) Current Tank Info: 325 6' wide Reef |
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07/24/2017, 05:33 PM | #9448 | ||
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The flow capacity of a piping system is dependent on the SMALLEST diameter. Therefore the flow capacity of the 1.5" pipe is pretty much irrelevant, for anything more than friction loss calculations. But let's look at the basic functionality of BA's design. Three discreet pipes, each with a unique function. What you actually have is an over-engineered Herbie type setup, because in the end, you only have two discreet pipes, the double top on one is irrelevant. When people tell you it "won't work" they are right: it will not work as a BA system is supposed to, because it is not a BA system, rather a two pipe system, more inline with Herbie... in the context of this thread, a BA has 3 discreet pipes; redundant statements to make it more clear what "It won't work" means... The basic safety features of the system rely on each pipe in and of itself being capable of "siphon" mode. Scenario: Siphon plugs. Dry emergency takes flow (which it normally should not.) Water level rises, Dry emergency goes through spasms as air purges, ultimately should achieve "siphon mode," e.g no air in the line. With the system you describe, that is not going to happen. Air will continue to be drawn in through the open channel. The air intake will increase, due to increased water flow down line, and make the system more unstable: more air = less water. The system will continue to be unstable until the open channel allows no more air to enter. This is basically defeating the whole concept of Bean's system, and you may as well be running an improper Herbie (a siphon with a trickle drain.) Instability is not necessarily a bad thing, as it alerts to a problem, but that really isn't the point here.
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"Things should be made as simple as possible, but not simpler." (oft attributed to Einstein; most likely paraphrasing by Roger Sessions; compactly articulates the principle of Occam's Razor) Current Tank Info: 325 6' wide Reef |
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07/24/2017, 06:54 PM | #9449 | |
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The reason is real estate inside the tank. I find that to be invalid as it is only several inches at the top of the tank, unusable real estate. Some worry about light loss, but there is plenty of light as the physics of light in a liquid are different than in the atmosphere...(well not exactly) pretty much a lot of do about nothing. Shoving the system into small external boxes, and small internal overflows, simply defeats the efficiency. IT is a complete system. These modifications take the technology backwards. E.G. long flat weirs back to small toothed weirs. For the most part I suspect it is just misunderstanding how it all works together, and why. The system is fine as designed, and also when "modified within certain limitations" functions as it should. Problems occur, when aesthetics, or convenience overrule the basic design criteria. Hence a 1000 opinions about a system that is very simple and straightforward... and the seemingly unending revisiting of the same mods/problems/solutions time and again...
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"Things should be made as simple as possible, but not simpler." (oft attributed to Einstein; most likely paraphrasing by Roger Sessions; compactly articulates the principle of Occam's Razor) Current Tank Info: 325 6' wide Reef |
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07/24/2017, 08:54 PM | #9450 |
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Alright. I got my system plumbing setup, I am having a hard time dialing in the siphon line, as its expelling bubbles, I pinched the valve back a bit to raise the water level in the overflow as it was kind of low, it helped but then I went to much and the open channel started taking the brunt of the load of the water.
Also my level in the tank is a bit below the black trim which is an eyesore =( Anyway to raise it up? I noticed if I increase the pump output it helps a bit. How are you guys dialing your return pump/ siphon line? |
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beananimal, plumbing |
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