mag drive 9.5
- Thread starter mitch303
- Start date
tastydog
New member
I knew there was a change to the wattage, I thought it would be negligible and perhaps at a 1/4 turn or less it is mostly. However, thank you for proving it to us all how much it can change. It doesn't make sense to me why this would be true, since the power is being applied regardless of valve open or closed. I guess it is like squeezing a battery powered drill with your hand that is low on juice, you can just stop it and yet it still pushing the max power through that it can.
Again, thanks for the correction and proof. (Mostly for the proof
If it were me, I would still use the mag 9.5 on the tank to gain the MAX out of the overflow. The overflow might be able to keep up with the mag 5 but, I don't know if the mag 5 would max out the overflow. *shrugg* At this point it is all opinion.
Again, thanks for the correction and proof. (Mostly for the proof
If it were me, I would still use the mag 9.5 on the tank to gain the MAX out of the overflow. The overflow might be able to keep up with the mag 5 but, I don't know if the mag 5 would max out the overflow. *shrugg* At this point it is all opinion.
The 9.5 far exceeds the maximum GPH of that overflow. I would guess it could not handle the flow of a Mag7. A Mag5 should be a pretty good match. There is no need to max out an overflow. With a siphon overflow, its more delicate balance. More than the minimum, so you dont have an air accumulation issue, but not up at the max either.
tastydog
New member
Far exceeds? I doubt that. I bet it may be off by 100-200gph. And it completely depends on how you adjust the overflow as well. Siphon overflows are not that delicate. And when I say max out, I mean maximize with room for error. However, again, this all opinion at this point. Also, that is why I ditched the weir overflow and went with an open double U PVC siphon with a surface skimming cup. The water level doesn't change in the tank but less than a centimeter even with a flow change of 300 gph. (I suppose this also why so many people like the drilled tanks and oh would that be nice.)
Anyway, I will stop pushing on the topic and just concede that there are lots of different ways to do this and in my opinion, they are all opinions
Live and love reefing and the wonderful community it has spawned.
Brandon
Anyway, I will stop pushing on the topic and just concede that there are lots of different ways to do this and in my opinion, they are all opinions
Live and love reefing and the wonderful community it has spawned.
Brandon
Isn't it a flawed objective to get the maximum out of the overflow in the first place though? You don't need more than 300-400 gph through a sump to begin with and with smaller sumps the more you try to push through them the more microbubble battles you are likely to wage. If you are looking to hit some kind of flow multiplier for the tank, like 10x's the tank volume in flow per hour, the return line should only be a small part of that and the majority should be power-heads or closed loops. The OP mentioned a 55gal tank and 20 gal sump. There is almost no reason I can think of that would need more than 300gph for a system like that through the sump. Even a skimmer doesn't need that kind of turnover and work better with lower turnover AFAIK.
Yes. Far exceeds. Its not opinion. That overflow cant handle anywhere near what a Mag9 can deliver. Its is not a very good design. I could go into why, but that doesn't really matter.
tastydog
New member
Okay. I will sthu. I think it isn't that far off, but heck I gave up on weir boxes a while back. the average 3-4 foot head on the 9.5 should be around 600-700 depending on elevation. With the rating of 800 and most likely 400-500 on the overflow, that leaves 300 max that we are off but probably only 100-200. that was all I was thinking about.
As far as flow through the sump, imho, pushing a max of at most 800 rated and probably 400-500 through the sump would be fine.
But seriously, I will sthu and stop posting because I seem to be pushing against _strong_ beliefs the other way.
As far as flow through the sump, imho, pushing a max of at most 800 rated and probably 400-500 through the sump would be fine.
But seriously, I will sthu and stop posting because I seem to be pushing against _strong_ beliefs the other way.
Id be surprised if That overflow can handle 350 GPH due to its design. I'll be generous and say 400 GPH. It rediculous how these things are sold. An 800 GPH rating is a joke and causes people to buy a pump that is way to large. This makes a narrow 200 - 400 GPH as a workable flow range. The Mag5 would be a good match,
RocketSurgeon
New member
How much flow do you want flowing through your sump? 55 gallons x 5 = 275 gallons [55 x 3 = 165]. A mag 3 would probably be sufficient, even with headloss. Your overflow will easily handle the mag 3 as well.
I've read countless posts on numerous forums that a mag 5 is sufficient for my 75 gallon. I went with a mag 9.5 only because I found it on sale from a fellow reefer.
I've read countless posts on numerous forums that a mag 5 is sufficient for my 75 gallon. I went with a mag 9.5 only because I found it on sale from a fellow reefer.
