GPH with 3/4" return to tank

[theMeat]

No lol my old iwaki would put 900 through it all day long! of wait its industrial grade lol my Jebao would do it all day long as well.

Your point however, is on point, thats what I run through each 3/4 return. You can do much more, but there is no reason. The weak spot is the drain anyway and the noise it makes.

True. If you run bean animal or herbie drain it’s pretty dang quiet. Think my wave makers are louder

 

[DCR]

No lol my old iwaki would put 900 through it all day long! of wait its industrial grade lol my Jebao would do it all day long as well.

Your point however, is on point, thats what I run through each 3/4 return. You can do much more, but there is no reason. The weak spot is the drain anyway and the noise it makes.

I size pumps and piping for a living as an engineer. I would never use a 3/4" pipe to carry 900 gph of water. Normal practice would be at least a 1-1/4" or even 1-1/2" for energy efficiency. How did you measure 900 gph from your Iwaki and what size was it? I think you would need at a least a 70 or 100 RLT to have any chance and the 3/4" run would have to be very short. It would not be at all energy efficient

 

[outhouse]

True. If you run bean animal or herbie drain it’s pretty dang quiet. Think my wave makers are louder

exactly where im at, turning the mp40's down to 60-70% you can barely hear them

 

[outhouse]

I would never use a 3/4" pipe to carry 900 gph of water

Neither would I

 

[outhouse]

70

You got it lol

 

[Thor2j]

+1 on above, I wouldn’t be confident on pumps abilities.

Anecdotal experience here; I have a 750XXL so similar display size. My return plumbing is 1”, ~5’ of physical head pressure and 4 elbows in my plumbing. I’ve tried several well made pumps rated around 2,750GPH (Varios-8, Red Dragon 150w) and 550GPH was my max observed flow.

I would venture to say, it would be noticeably less with 3/4” return line.

I currently have COR 20 running at 55%. It comes out at 3/4 inch , goes through UV. I'm at 400gph measured with apex.

 

[AJsReef]

I currently have COR 20 running at 55%. It comes out at 3/4 inch , goes through UV. I'm at 400gph measured with apex.

What can you hit at 100%?

 

[Thor2j]

Neither would I

I didn't make the tank innovative marine did, pretty good reputation. My entire point of this post was:
A) WHY is IM advertising their tank with a recommended flow of 2000-4000 gph with a 3/4" return.

B) Can I get 900 gph return with 3/4" pvc. I am a fan of 3-4x water volume turnover . Have had very successful reefs for 30 years. If I go low it would be about 720gph and high about 900. I'll be using a COR 20.

I'm well aware of the charts out there that show gravity max of around 640 gph. What I'm trying to figure out is how much psi reef pumps actually put out. To me it doesn't seem like much.
Thanks

 

[outhouse]

How did you measure 900 gph

Simple, I can see it and know exactly how much flow I have. I used to set up water supplies for cities that have no water, we tried to get water for Cambria Ca but only got small amounts and a lot of salt water 15 miles inland. I did Portola Ca water supply when they poisoned lake Davis, I did Greyeagle Ca water supply and had an artesian well that produced 1000 gpm that had half black sand for 2 hours. Needed a backhoe just to clear the sand from the rig.

Its old school, and math. 4 seconds to fill a gallon container is 900

 

[Thor2j]

What can you hit at 100%?

Don't know, never tried.

 

[outhouse]

A) WHY is IM advertising their tank with a recommended flow of 2000-4000 gph with a 3/4" return.

Sounds like ignorance, lies, error, or the usual miscommunication

B) Can I get 900 gph return with 3/4" pvc.

You can, but it is a waste of money and will be noisy.

 

[Thor2j]

Sounds like ignorance, lies, error, or the usual miscommunication

You can, but it is a waste of money and will be noisy.

Why would it be noisy?? It's less then 4 times tank turnover. Drains are 1 inch animal bean.

 

[Logical_Plan]

I didn't make the tank innovative marine did, pretty good reputation. My entire point of this post was:
A) WHY is IM advertising their tank with a recommended flow of 2000-4000 gph with a 3/4" return.

B) Can I get 900 gph return with 3/4" pvc. I am a fan of 3-4x water volume turnover . Have had very successful reefs for 30 years. If I go low it would be about 720gph and high about 900. I'll be using a COR 20.

I'm well aware of the charts out there that show gravity max of around 640 gph. What I'm trying to figure out is how much psi reef pumps actually put out. To me it doesn't seem like much.
Thanks

Pumps are rated by head, not psi. They don't directly produce psi, it is a result of the connected system.

COR 20 pump curve attached.

If my plumbing assumptions in my first post are right the pump will see 10.23 feet of head in 3/4" PVC at lengths and fittings stated. So maximum from pump curve is 800 gph ish.

As for your original question, innovative marine literature makes no sense. But must engineers are idiots anyway, I left the profession because tradesmen we're much smarter than my colleagues.

 

[outhouse]

A) WHY is IM advertising their tank with a recommended flow of 2000-4000 gph with a 3/4" return.

They are not recommending that flow, that is just the size of pump they are telling you to use.

Return Pump Flow Rate: 2000-4000GPH that is their words , but thats not what the pump produces after head height and restriction due to your 1 3/4" drilled return hole.

 

[Thor2j]

They are not recommending that flow, that is just the size of pump they are telling you to use.

Return Pump Flow Rate: 2000-4000GPH that is their words , but thats not what the pump produces after head height and restriction due to your 1 3/4" drilled return hole.

So do you think co20 is enough?? I'll be running the return through a 80w uv as well.

 

[Logical_Plan]

A) WHY is IM advertising their tank with a recommended flow of 2000-4000 gph with a 3/4" return.

Also perhaps they assume that the average user won't dig deeper or test flow. If you buy a pump rated in the 2000-4000gph range, it works at 2-4 times turn over. Which is the desired rate through sump anyway.

 

[outhouse]

Why would it be noisy?? It's less then 4 times tank turnover. Drains are 1 inch animal bean.

I have had many tanks in 30 years, and run a 210g right now. Im running 700 through two 3/4 returns

Any more then that and the drain gets noisy, that is a lot of water that is not needed. You dont need 4 X either.

I run a 100G basement sump, and use a DC jebao 3000 gph pump, at 45% capacity. If you use that under your tank, you can kiss sleeping off because you will hear your tank in the next room.


SO for you my friend, you will run a DC pump for a few reasons, but one is AC savings, the second is controllability. You will need to control your flow.

You will run 1 /14" PVC all the way up to the 3/4 fitting which helps DC pumps operate easier. As large as you can as long as you can. You get a jebao DCP 10000 and you will be able to run it at 25% under the tank and have more than enough flow.

 

[outhouse]

So do you think co20 is enough?? I

That is more than enough. You will be fine. You will have to turn it way down. ----- Most DC pumps dont have the best reliability, so instead of buying expensive name brands, I went with 120 dollar jebao, and keep an extra pump for back up at 240 bucks total. Im 6 years in using the jebao, no problems as a basement pump. I also use a small jebao on my Ca reactor, im 3 years on that pump, still going strong.

 

[outhouse]

I'll be running the return through a 80w uv as well.

I made a drain manifold, I run everything off my drain lines. Only my calcium and kalk reactors have their own pumps.

But if you did, you could tap into it the 1 1/4 pvc and you will still have more then enough pump flow. I did just that for my GFO container come to think about it

 

[outhouse]

Why would it be noisy??

I had to insulate all my PVC and or tubing, because the water running through it is louder than you think. Thats through 2 drains. I mine are both dursos, but thats not the noisy part. Its the pipe or tube that creates noise from flow.

Thats also knowing im talking about a basement sump. A sump under your tank? you will love that DC controllable pump.