Return Pump Speed?

[BetterJake]

I have a reefer 250 G2 using all the standard plumbing that comes with it. The RedSea manual recommends 660gph for this tank.

I'm using the Sicce 6.0 SDC pump which has a range of 530 - 1450. Let me know If im bad at math or misunderstanding.

So what would I set my return pump power % to achieve around that 660 gph flow rate?

There's a range in the pump of 920 gph between the lowest (530) and highest setting (1450).

So 15% would be 138 gph, add that to the min 530 and that gets it to 668 GPH?

 

[vetteguy53081]

I have a reefer 250 G2 using all the standard plumbing that comes with it. The RedSea manual recommends 660gph for this tank.

I'm using the Sicce 6.0 SDC pump which has a range of 530 - 1450. Let me know If im bad at math or misunderstanding.

So what would I set my return pump power % to achieve around that 660 gph flow rate?

There's a range in the pump of 920 gph between the lowest (530) and highest setting (1450).

So 15% would be 138 gph, add that to the min 530 and that gets it to 668 GPH?

always start lower and build

 

[KStatefan]

That range is at zero head pressure. You will not get that with plumbing attached.

 

[dstockwell]

Sorry if I’m wrong with this, I have a DC pump and at first was trying to run @ x, but I was running faster than water drained. So I think you have it balanced at what your system is happy with.

 

[KStatefan]

I would guess that you would be close to 100% to get that much flow to your tank. I ha the SDC 7.0 on my uv and am set at 29% to get 200 gph to the tank

 

[Reef.]

I have a reefer 250 G2 using all the standard plumbing that comes with it. The RedSea manual recommends 660gph for this tank.

I'm using the Sicce 6.0 SDC pump which has a range of 530 - 1450. Let me know If im bad at math or misunderstanding.

So what would I set my return pump power % to achieve around that 660 gph flow rate?

There's a range in the pump of 920 gph between the lowest (530) and highest setting (1450).

So 15% would be 138 gph, add that to the min 530 and that gets it to 668 GPH?

I wouldn’t worry too much on the numbers, just try and get your return silent, you will,see,if it’s turned up too high as the water in the tank will back up if it’s too high as the water can not go over the over flow fast enough, you then just turn it down a little, this will get you the greatest flow for your tank, if that is too much just turn it down, then when you add corals you can then go by if they look happy or not if the flow is too much.

 

[BetterJake]

always start lower and build

I wouldn’t worry too much on the numbers, just try and get your return silent, you will,see,if it’s turned up too high as the water in the tank will back up if it’s too high as the water can not go over the over flow fast enough, you then just turn it down a little, this will get you the greatest flow for your tank, if that is too much just turn it down, then when you add corals you can then go by if they look happy or not if the flow is too much.

Thanks for the feedback. The return is silent with the pump at 70%. The reefer overflow can handle it fine. My main issue now is just noise from the pump itself. I thought the SDC line was supposed to be silent, but it's far from the case here.

 

[vetteguy53081]

Thanks for the feedback. The return is silent with the pump at 70%. The reefer overflow can handle it fine. My main issue now is just noise from the pump itself. I thought the SDC line was supposed to be silent, but it's far from the case here.

Last time I had a noisy pump (long ago), I placed it on top of blue filter foam and it muffled the humming greatly

 

[KStatefan]

Thanks for the feedback. The return is silent with the pump at 70%. The reefer overflow can handle it fine. My main issue now is just noise from the pump itself. I thought the SDC line was supposed to be silent, but it's far from the case here.

Do you have a short section of silicon tubbing on it?

 

[BetterJake]

Do you have a short section of silicon tubbing on it?

I used the green flexible tubing that came with the reefer and had to use a barb reducer to get it to 5/8”. You think that may be the issue?

 

[KStatefan]

I used the green flexible tubing that came with the reefer and had to use a barb reducer to get it to 5/8”. You think that may be the issue?

That is a possibility. Silcon is more flexible and will not transfer as much noise as the green hose. I use it on both my SDC 7.0.

 

[BetterJake]

That is a possibility. Silcon is more flexible and will not transfer as much noise as the green hose. I use it on both my SDC 7.0.

May have to give that a shot this weekend, tank is in the living room so I’m going to go crazy if I can’t solve it

 

[Reef.]

Good luck, I gave up on sicce could not get mine quiet at all, moved to Jacod.

 

[OfficeReefer]

I have a reefer 250 G2 using all the standard plumbing that comes with it. The RedSea manual recommends 660gph for this tank.

I'm using the Sicce 6.0 SDC pump which has a range of 530 - 1450. Let me know If im bad at math or misunderstanding.

So what would I set my return pump power % to achieve around that 660 gph flow rate?

There's a range in the pump of 920 gph between the lowest (530) and highest setting (1450).

So 15% would be 138 gph, add that to the min 530 and that gets it to 668 GPH?

This is kinda my issue. I bought a Sicce SDC 3.0 and are already looking for a replacement, may just get an Apex unit. I have a Reefer 250 v3 with UV and it runs or appears to run around 600gph at 100%. In fact, the weird part is it was essentially the same amount of power as the Synca 3.5 standard pump. The pump is no doubt a decent pump but I was hoping it would reflect GPH or GPM (not 100% or something not very useful as to the pumps actual performance over time). There is always the "add an Apex flow sensor" but I was hoping to avoid further flow restrictions on this pump.