Is my return pump too small?

[BrettE]

I've been acquiring gear for my setup, and I'm second guessing my return pump. I'm getting a Cade 1500 S2, which has a 142 gallon capacity in the main tank. I have a Vectra S2, but I'm starting to think I should've gotten an M2. I think I'll have about 5 feet of head. The performance graph for the Vectra S2 is a a little small to read precisely, but I think that puts me somewhere in the 600-650 GPH flow rate.

My gut feeling is I should try to swap it for a Vectra M2.

Is that enough?

What do you all think?

 

[Subsea]

Why not add more circulation in the tank. As you increase flow rate from sump to display, you will increase noise.

 

[findingsimple]

I’ve got the M2 on the 1200 S2/P - I’m only running it at about 30% - but I could probably up the flow if I wanted.

I’ve also got the s2 for feeding other stuff.

The s2 definitely doesn’t have the grunt of the m2 and I’m happy with m2 as my main return

 

[BrettE]

Why not add more circulation in the tank. As you increase flow rate from sump to display, you will increase noise.

I have two MP40 power heads too.

 

[mfinn]

The S2 will be fine for your tank.
But it will probably be running at or near 100%.
While I don't think you absolutely need to upgrade, it might not hurt if you can get a good price for the S2.