Silent and Failsafe Overflow System
- Thread starter JohnL
- Start date
uncleof6
Active member
LFS is going to tell you what you want to hear, not what really should be. They are just as antiquated as the rules of thumb. It is really hard for them, as well as others, to get a grip on the fact that these are multi-pass systems, not single-pass. Higher flow rates work better, more efficiently.
Just a few points: Higher flow = better surface skimming/surface renewal. This improves the skimmer performance by keeping the concentration of dissolved organics in the skimmer's influent higher. (factors for skimmer performance: bubbles size, contact time, concentration of dissolved organics.) Better surface skimming/renewal = better gas exchange, which increases dissolved oxygen levels, and reduces carbon dioxide levels, which helps keep the pH up....'aquariology' is a science, not a rule of thumb...
Of course Bean's system has a very wide bandwidth. But if going that far, why not do it right?
Just a few points: Higher flow = better surface skimming/surface renewal. This improves the skimmer performance by keeping the concentration of dissolved organics in the skimmer's influent higher. (factors for skimmer performance: bubbles size, contact time, concentration of dissolved organics.) Better surface skimming/renewal = better gas exchange, which increases dissolved oxygen levels, and reduces carbon dioxide levels, which helps keep the pH up....'aquariology' is a science, not a rule of thumb...
Of course Bean's system has a very wide bandwidth. But if going that far, why not do it right?
Last edited:
uncleof6
Active member
I am trying to determine how much water will flow out of the full syphon using 1.5" bulkhead and 1.5" pipes. I used this page:http://www.beananimal.com/articles/hydraulics-for-the-aquarist.aspx . It calculates at 48" with a submerged discharge that 1.5" will carry just over 5300gph. Have I done this right? 5000+gph? I assume that number would drop some if one is using 45's to get the end of the syphon pipe under the main tank into the sump. Either way, that is a huge amount. Any confirmations? Thx
how much going thru your sump will be determined by 1)your pump and 2) how much can flow thru a given syphon, no? My concern is having the flow from the pump but not having the flow in the full syphon to match. That would mean I'd be throttling back on the pump and losing flow because the syphon can't keep up.
I've managed to read 102 pages of the thread (first 40, and 62 of this one).
If someone can correct where I may be mistaken, it'd be awesomesauce...don't ask.
110g (or 120g) tank. 40 gallon sump.
1" schedule 40 bulkheads
1.5" piping.
Eheim 5000 return pump.
1" return hole(s) as recommended by Uncleof6.
30" Inky Style Overflow box, From top to floor is 5.25"
From Bottom of Trim to Emergency and Open Siphon = 2.25"
From Bottom of Trim to Main Siphon = 2.75"
If I'm understanding correctly, as described above can dish out in the vicinity of 2,000 gph.
The biggest question I have, well there are 2....
1) Will the pump I've settled on getting suffice?
2) Should i run just 1 1" return line, or T it off to each side of the tank?
I am planning on having the emergency pipe above the water level of the sump so I can audibly hear if there's an issue.
The open and main siphon will then be 1-2" below the sump water level.
Am I at least on the right track, or am I forgetting about something?
If someone can correct where I may be mistaken, it'd be awesomesauce...don't ask.
110g (or 120g) tank. 40 gallon sump.
1" schedule 40 bulkheads
1.5" piping.
Eheim 5000 return pump.
1" return hole(s) as recommended by Uncleof6.
30" Inky Style Overflow box, From top to floor is 5.25"
From Bottom of Trim to Emergency and Open Siphon = 2.25"
From Bottom of Trim to Main Siphon = 2.75"
If I'm understanding correctly, as described above can dish out in the vicinity of 2,000 gph.
The biggest question I have, well there are 2....
1) Will the pump I've settled on getting suffice?
2) Should i run just 1 1" return line, or T it off to each side of the tank?
I am planning on having the emergency pipe above the water level of the sump so I can audibly hear if there's an issue.
The open and main siphon will then be 1-2" below the sump water level.
Am I at least on the right track, or am I forgetting about something?
SGT_York
New member
The 5,000 is maximum capability, absolutly not a requirement. And yes a 1.5" pipe can handle serious flow.
Clugo, a BA can handle any amount of flow, within it's range more or less if you increase the pipe size, however the turnover 2-3x is irrelevant, you need to use GPH, as we don't know the size of your tank.
Clugo, a BA can handle any amount of flow, within it's range more or less if you increase the pipe size, however the turnover 2-3x is irrelevant, you need to use GPH, as we don't know the size of your tank.
kegogut
Active member
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