How quickly does the COR pump ramp?

ca1ore · Sep 10, 2018

Loads of COR threads, but I did not see this question addressed. For anyone who might be using the COR20 in a closed loop, how quickly does it ramp? For example, if I were to run it at 10%, how long would it take to get up to 100%? Would it produce a strong pulse, or a wimpy one? Thanks in advance.

Reeferdood · Sep 10, 2018

I use the COR 20 on my return and it moves a lot of water. If you are using one for a closed loop it could be set up to ramp up pretty quickly. Without the head pressure my guess is that you would not be able to run it at 100%. What size tank will you be using it on?

ca1ore · Sep 10, 2018

Reeferdood said:
Without the head pressure my guess is that you would not be able to run it at 100%.

Hmmn, that doesn't really track for me .... can you kindly share your thinking?

https://www.reef2reef.com/threads/simons-450.330108/

Reeferdood · Sep 10, 2018

Closed loop pumps don't have head pressure since the inlets are very close to the outlet in height. I assume you are plumbing it this way?

ca1ore · Sep 10, 2018

Reeferdood said:
Closed loop pumps don't have head pressure since the inlets are very close to the outlet in height. I assume you are plumbing it this way?

Yes, I understand that

. Actually doesn't matter whether the inlets/outlets are at the same level or not as long as they are in a shared body (though there will be friction losses). What I was curious about was why you think the lack of head pressure would preclude the pump from working at 100%. I don't see why that would be?

Reeferdood · Sep 10, 2018

ca1ore said:
Yes, I understand that . Actually doesn't matter whether the inlets/outlets are at the same level or not as long as they are in a shared body (though there will be friction losses). What I was curious about was why you think the lack of head pressure would preclude the pump from working at 100%. I don't see why that would be?

How big of a tank are you going to do this and what model Cor?
I am a fan of closed loops, I ran one on an older tank and will do it again on my big build. The way I did it was to use an oceans motions 4 way and it was awesome..
For a tank under say 75 gallons I would think that a COR 20 at 100% would be a bit much..
I was just tossing those numbers out not knowing what size system you have..

ca1ore · Sep 10, 2018

I figured I'd just ask Neptune - answer is a few seconds.

Reeferdood · Sep 10, 2018

Good luck with the build.

ca1ore · Sep 10, 2018

Tank's a 450, already up and running with a closed loop (and OM 4-way ..... love that thing

). I was noodling over a Carlson/borneman surge device, but then somebody pointed out that a pump like the COR could do the same thing with less noise and mess - which is probably true. Not that I necessarily 'need' more flow; but I just cannot resist fiddling with the tank.

Reeferdood · Sep 10, 2018

450!!

Maybe one day...
I ran a dart on mine at the time, it really was a good setup.

Water Dog · Sep 10, 2018

Anything wrong with the Vectra that you’re currently using for your closed loop? Why the change?

ca1ore · Sep 10, 2018

No, Vectra has been rock solid for me; just noodling over ways to get different kinds of flow; namely a big slug every few minutes from one end.

User1 · Sep 10, 2018

Hi @ca1ore I don't have the 20 but I do run a pair of Cor 15's. If I understand the question correctly it is how fast do they go from 0 to 100%(or setting), correct? Mine always run at 100% but I will say there is a delay I notice after a off state. For example if I turn off the skimmer, empty the cup, then turn it on back at the fusion portal there is a delay. I can click it, then walk over to the sump and see it not on, then next thing it is going.

It isn't like a AC pump that you flip the switch and it is on. On the other hand if you are say running at 50% then want to hit 80% I believe it is a bit quicker because the schedule or code is already active. Anything regarding the middle layer, Fusion, is going to be a delay. I'm thinking since you are going to code the variance it will be perfectly fine and not noticeable. They are built like a brick, thick walls, and have some good feedback (although crappy error message) if something gets jammed (small snail) or putting it back together and the o-ring is off. I'm pretty happy with the pair I have although I'm thinking they may need to be cleaned a bit more than what I prefer. But that could also be due to my tank maturing still. I would have went with the 20's instead but didn't want the additional power brick - the 15's just plug right in to the system and done.

Not sure if I answered this correctly but hope there is some small value in it...

ca1ore · Sep 10, 2018

I was trying to figure out if I could use it to replicate the periodic pulse of a Carlson-type device. So, it would be running nominally for 5 minutes, ramp up to 100% for say 30 seconds and then back to nominal. But I'd need it to be able to go from nominal to 100% quickly.

User1 · Sep 10, 2018

ca1ore said:
I was trying to figure out if I could use it to replicate the periodic pulse of a Carlson-type device. So, it would be running nominally for 5 minutes, ramp up to 100% for say 30 seconds and then back to nominal. But I'd need it to be able to go from nominal to 100% quickly.

That makes sense. Maybe I can do a test although I've not really played with Apex and their coding.