New pump and plumbing

[Humpty]

So you are suggesting that I just run 1 return pump and tee it into both return bulkheads?

[Myka]

Originally Posted by Humpty

So you are suggesting that I just run 1 return pump and tee it into both return bulkheads?

Yes, though I'd suggest you have a second pump ready to go. You can switch them out to clean them. Super handy. One is hooked up and working, then other one is disconnected and cleaned, and ready for the next change out. Then when one craps out, you won't be in a big panic to find one. Plus it will be a long weekend, and everything will be closed, and you'll end up paying $40 in express shipping to get it asap because that's how return pump breakdowns happen.

At 5 ft head pressure and some fittings it looks like you'll have about 1400 gph according to the chart I found. If you have 30-50 gallons in your sump that gives you 6-6.6x turnover through the sump. I usually aim for 3-6x turnover, so you're good to go. If you go too fast through the sump you'll get microbubbles in the display, and it's a waste of electricity because the skimmer can only process so much water, so providing it with more dirty water than it can process is a waste.

[Myka]

Also, you have two drain lines that are both 1.5"? Are you planning a Herbie silent drain? I hope so.

[Humpty]

oops i didnt see the above post before i posted the last one.
So if i am running one pump instead of 2 should i get a bigger one? maybe the jebao dc12000.
What kind of flowrate should I be looking for? At the moment I am running 2 quietone 6000s, but according to the flow chart I am only getting about 750gph out of each. I have a 180g tank and 80g sump.
It looks like a dc12000 plumbed like you said would get more flow rate then 2 quietones the way they are now.
Currently i have a reef octopus 5000sss skimmer.

[Myka]

Originally Posted by Humpty

I have a 180g tank and 80g sump

So is the sump half full? About 40 gallons in the sump?? See the above post for the flow rates I calculated for you.

[Humpty]

the overflows are in each corner. I have the stockman setup. and yes the sump is just over half full. Those flow rates were for the dc9000?
I just double checked and it looks like I have 3/4" return lines. Does that change the flowrate?

[dustinc]

I have a DCS9000 plumbed into a single 1" return... it does come with an adapter for 3/4" but I wouldn't go with a single 3/4"... I only run mine at 60%