Closed Loop Pumps
- Thread starter matttvi
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Were talking apples and oranges here. I've been talking about tank turnover and your talking about water velocity. No matter how much you restirct the output of the water your still getting the same gph or less, but you will increase the velocity of the water out of the pipe.
If you want to turn the tank over 20x then you need a pump that will do this.
Matt,
With a tank full of anemone's this is a great idea to have a closed loop. this prevents the unfortunate chance of one getting pulled into a Power head, but I don't think you need that much flow for an anemone only tank. The mag 9.5 might be enough.
Rob
yeah, the CL works nicely as the intake can be spread out over a larger area as opposed to the concentrated powerhead, i had intended to build small boxes around each ph, but now that they have the recall going, i think it's a good time to switch to a CLM.
i want the higher in tank turnover to keep detrious in the water column and dead spots to a minimum. That's why i'm targeting the 30x +/- figure, the reef itself sees a lot more movement than that even...
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Rob, You are right, we are comparing apples to oranges. For a BTA tank, where filter feeding is not a huge priority, valocity is more of a concern then GPH. I am just all about saving money when need be and Matt can achieve good results witha MAG 9.5 or 18 over a 2400GPH pump.
Well...
Perhaps I'll go w/ the poseidin... i'm a little leary of using a mag-drive pump externally, even though I know many people have done so... I may go w/ the Mag18 in the end to save some cash... but I'm still thinking along the lines of the squence snapper as it is only 98w in power consumption...
the poseidin and mag18 are each 140w+... on a 15amp outlet that's already getting close to 10amps used up for the tank alone, I'm trying to avoid pushing it as much as possible, even if it means spending a little more for a more efficient pump.
Perhaps I'll go w/ the poseidin... i'm a little leary of using a mag-drive pump externally, even though I know many people have done so... I may go w/ the Mag18 in the end to save some cash... but I'm still thinking along the lines of the squence snapper as it is only 98w in power consumption...
the poseidin and mag18 are each 140w+... on a 15amp outlet that's already getting close to 10amps used up for the tank alone, I'm trying to avoid pushing it as much as possible, even if it means spending a little more for a more efficient pump.
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MattTVI;30204 wrote: Well...
the poseidin and mag18 are each 140w+... on a 15amp outlet that's already getting close to 10amps used up for the tank alone, I'm trying to avoid pushing it as much as possible, even if it means spending a little more for a more efficient pump.
Some thing to think about for sure... I wish I had my Mag 18 right now ( I have yet to order it, Maybe this weekend) so I could give you better advice about the end result.
Was there an argument against getting the Snapper and throttling it back vs. getting a lower rated, but much higher power consumption pump?MattTVI;30204 wrote: Well...
Perhaps I'll go w/ the poseidin... i'm a little leary of using a mag-drive pump externally, even though I know many people have done so... I may go w/ the Mag18 in the end to save some cash... but I'm still thinking along the lines of the squence snapper as it is only 98w in power consumption...
the poseidin and mag18 are each 140w+... on a 15amp outlet that's already getting close to 10amps used up for the tank alone, I'm trying to avoid pushing it as much as possible, even if it means spending a little more for a more efficient pump.
BTW, according to MDM, throttling the Reef Flo pumps (
After looking at that calculator on RC, I'm thinking that I might get the Snapper since after the friction loss around the corners and through valves and unions, I'd be right around my target 1800 gph for my 60 gallon cube.
The planning will have to be careful though. 2x2 area doesn't leave much room for lights *and* 1 1/2" pipes.
The planning will have to be careful though. 2x2 area doesn't leave much room for lights *and* 1 1/2" pipes.
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NAtt, that is true but in theory the pump will only have to suck for the first turn on, after that a siphon effect should take place to some extent. I do not know much about sequence pumps in this regard though.
Theoretically, unless you're doing a tear-down or major water change, your closed loop should always be flooded. The cohesion of water should pull it up and down. The pump has to be able to do some sucking of water. There's simply no way gravity can feed a pump 3600 gph through a 1 1/2" hole without some force.
The intake just needs to be below the lowest level the water can drop to if the power goes off.
Or, for that matter, how about construct a self-priming container to put in front of it? Or you could buy one http://www.marinedepot.com/md_viewItem.asp?idproduct=DP2919">http://www.marinedepot.com/md_viewItem.asp?idproduct=DP2919</a>
Yes, I like this last idea best of all. :)
The intake just needs to be below the lowest level the water can drop to if the power goes off.
Or, for that matter, how about construct a self-priming container to put in front of it? Or you could buy one http://www.marinedepot.com/md_viewItem.asp?idproduct=DP2919">http://www.marinedepot.com/md_viewItem.asp?idproduct=DP2919</a>
Yes, I like this last idea best of all. :)
