Help with Vectra s2 % setting

[Sam22]

Hi I have a new set up my first one and I’m just wondering about the % to set my return pump at. I have a 250litre about 70 gallon display and a vectra s2 return pump I’ve read a lot about tank turn over etc and was just wondering a rough % to set it at. Echotech says the return pump has a 5,300 litre flow and max 11.5 ft head.
my head is roughly 4 ft with a 250 display is there a rough % for the return to have a tank turnovers for a mixed reef spa and lps
Thanks!

 

[Sam22]

?

 

[mfinn]

Generally you want anywhere from 3x to 6x the tank volume through the sump.
It also depends on what your overflow will handle.
But just for guessing sake, the most I would want to run in your tank is about 350-400 gph.
Maybe a little slower if it runs noisey.
I would start at about 50% and go up or down as needed.

 

[LC8Sumi]

Depends on the return pipe diameter. If it is small, like 16-22mm, than 100% would probably get you to something like 1000-1200lph

 

[Sam22]

The return is a flexible 25mm hose the only bend is a elbow that directs return into display. I’m running at 50% atm and the overflow is handling it. Should I just increase until the overflow can no longer handle the flow coming in

thanks guys

 

[mfinn]

The return is a flexible 25mm hose the only bend is a elbow that directs return into display. I’m running at 50% atm and the overflow is handling it. Should I just increase until the overflow can no longer handle the flow coming in

thanks guys

I would not do that. If you push it too much, then any little hickup could create a problem.
If it's running fine, then why change anything?

 

[Sam22]

Ye it’s running fine and silent have just been looking into working out head loss to try work out the tank turnover to get it to x3-x6 but struggling to work it all out.

 

[Sam22]

I guess if 100% is around 1000lph-1200lph and I’m running at 50% then the tank turnover is about 4.5?

 

[LC8Sumi]

+1 don't push too much. 25mm sounds like a good return diameter for the tank size, I think something like a 50-60% setting should be enough and get you to the 1-1.2k lph range.

 

[Sam22]

Perfect thanks for the help