Matching pump to existing Overflow size

[oswego]

I have a 180 gal tank. It has two holes drilled in back near top. One is for bulkhead with 1" pvc pipe and the other is for 1/2 " pipe.

What volume will drain out the two pipe sizes combined.

I want to get a pump that will give me max turnover but not more return volume than the two pipes can drain out..
I plan to send both pipes to a wet/dry sump.

Total head will be 5' and I am thinking of having two pumps(half sized) so that incase one quits I won't lose all filtration. Each pump will have its own return line.

I am also thinking of letting the smaller pipe first go to a thirty gal with plants and light and it then drain to the top of the Wet/Dry. That should reduce my water changes for Nitrates.

 

[oswego]

Any help out there?

"I have a 180 gal tank. It has two holes drilled in back near top. One is for bulkhead with 1" pvc pipe and the other is for 1/2 " pipe.

What volume will drain out the two pipe sizes combined.

I want to get a pump that will give me max turnover but not more return volume than the two pipes can drain out..
I plan to send both pipes to a wet/dry sump"

 

[syndicate]

Go into the diy section there a sticky on size flow rates

 

[oswego]

Thanks
Looks like the answer to my question is 750 gph

Now I can plan for my pump size.
looks like I can get four turns per hour with my oversized Wet/dry and with the canister filter I plan to get I should be good to go.

 

[Deepsouth]

I think that 2 of those size would be ok.

 

[Pharaoh]

I would personally only put no more than 600gph at that tank. That would leave you with a bit of overflow room in case the other slows down.

 

[oswego]

I would personally only put no more than 600gph at that tank. That would leave you with a bit of overflow room in case the other slows down.

Great minds think alike. I did not want to Push It close to the limit and have decided on using two pumps with a 300 gph at my five foot head with a total of 600 gph. If one pump were to bite the dust the other would keep going until I could replace the other.

 

[joey02]

I have three 1" bulkheads on the back of a tank. I run a mag-drive 7 @ 5 feet of heigth. The water level raises above the bulkheads if i run all of the water from the pump, directly to the main tank, so there is no skimming of the water unless i redirect some of the flow back to the wet/dry befor the tank causing the water level to drop a bit for skimming.

your 1" and 1/2" bulkhead wont be able to handle much at all since it is all on the back wall. espesially if you want it to skim the waters surface as well.

 

[oswego]

I could start with one 300 gph and then make decision on whether to add second pump or get a nice cannister filter.
Either way I'm moving forward, I have enough scrubbies now for my large wet/dry and acquiring the plumbing for overflow and return lines.