75gal Tank W/ 20 Gal Sump

Hey everyone!

I am currently setting up a new 75 gal tank and it has a 20 gal sump.

I have never used a sump before, it is being installed by a friend with massive salt and freshwater experience.

The sump pump he gave me is faulty and done for so I ordered a new one.

Jebao DCP Sine Wave Water Return Pump DCP-4000

From my research I am able to deduce that it is 4000l/h, 32W, up to 4.0M height.

If I am to convert this that means it is a 1058 GPH flow rate up to 12FT Height.

10x the tank size would be 750GPH needed.

The only thing I need help calculating is what the flow rate will be at a 4FT height.

Since this states 1058GPH at max of 12FT. Does this mean I will get 1058GPH up to that height. I know as you raise elevation power is lost.

Does anyone know how to calculate this?

I have the overflow directed into bonded filter material with bio wheels underneath.

I am going to rehome my 6 inch Oscar into this tank.

Will this be adequate filtration?

 

Most single overflows move 750 GPH water to the sump .
I use Jeboa DC pumps and just got the DCT 4000 to pump about 3' up.It does this easily on a 1/2 line with 6 gated valves on speed 2 !


I don't do calculations and the pump doesn't make you either . You should have 10 choices of speed to adjust your tank till it is perfect.
A sump should be the best filter you can get ..I run several that I made or upgraded.
Got pictures of the filter and your fish ?
Welcome .

 

Here is a picture of my O I’m putting in the tank.

That’s a heck of a setup!

No picture yet, I get the pump tomorrow. Once I get it going I’ll post some pictures.

The sump is homemade. I wasn’t the one who built it but it’s a basic design.

Overflow flows into a box with the filter pad and bioballs, it overflows into another container and than to the container with the return pump. It’s ran on 3/4 tubing.

How will I know what the proper setting is?

 

Run the pump full speed and see if the overflow can keep up .Or dial it up and see ?
Odds are it will handle full flow . Most people say this and that but the pump is what runs the tank flow .Whether high or low the water always has to be X level to enter overflow so only other variable is speed. Next is size of return line .Many pumps give actual results with a larger hose then most use .Also the 1058 is not at 10 feet that is at 0 feet .12 feet is max head it will pump at all in most cases.
Elbows count as 1 foot on return lines as far as head pressure goes .
The Jeboa rules with controls so you should easily be able to dial in to proper speed .
Nice Oscar ! I just saw his pic on other thread . "Indy " huh ?
Here is your flow chart ;

 

Yes I can calculate it. How long is the horizontal length and how many 90 or 45 angles do you have

 

Nice! Yeah his names Indy.

So if I’m looking at that right for 4 feet it’s around 500GPH.... not what I was hoping. Was hoping for at least 750GPH...

Yes I can calculate it. How long is the horizontal length and how many 90 or 45 angles do you have

Are you talking about the horizontal length of the tank? It’s a rectangle 48” wide.

 

Are you talking about the horizontal length of the tank? It’s a rectangle 48” wide.

Also this is a duplicate thread, idk why it posted twice. This will probably get deleted.

I know. I have 4 75s. I mean the length of pipe on the discharge side that is horizontal.

Here:
Pump head (H) can be converted to pressure (P) using the specific gravity (SG) of the fluid by the equation:

P = 0.434 • H • (SG)

or by the density of the fluid (ρ) and the acceleration due to gravity (g):

P = H • ρ • g

 

Does friction loss in relation to the hose diameter have any factor in the calculation?

 

I know. I have 4 75s. I mean the length of pipe on the discharge side that is horizontal.

Here:
Pump head (H) can be converted to pressure (P) using the specific gravity (SG) of the fluid by the equation:

P = 0.434 • H • (SG)

or by the density of the fluid (ρ) and the acceleration due to gravity (g):

P = H • ρ • g

When you say discharge are you talking about the fill hose from the pump to the tank, or the hose from the overflow into the sump?



Here are some pics.

Tank from floor to top is exactly 4 feet

 

Does friction loss in relation to the hose diameter have any factor in the calculation?

It can. You can calculate for that or assume loss due to friction being negligible

When you say discharge are you talking about the fill hose from the pump to the tank, or the hose from the overflow into the sump?

Discharge = outlet of the pump. As in pump to tank.
Suction = tank to overflow to downpipe to sump to intake of the pump.

Theres a lot of reading up on fluid systems you should probably be doing if you are going to use a sump system. Not trying to be mean but you could have some messes if you don't know how it works and what to do.

 

Discharge = outlet of the pump. As in pump to tank.
Suction = tank to overflow to downpipe to sump to intake of the pump.

Theres a lot of reading up on fluid systems you should probably be doing if you are going to use a sump system. Not trying to be mean but you could have some messes if you don't know how it works and what to do.

I apologize I don’t know the terminology. I have a decent understanding, just the finer points I’m not aware of.

 

I apologize I don’t know the terminology. I have a decent understanding, just the finer points I’m not aware of.

The terminology is not a finer point. Also I'm talking components and sections.

 

The terminology is not a finer point. Also I'm talking components and sections.

I can appreciate your concern. I feel you have a decent understanding of how to run an aquarium with a sump filter.

So expert to beginner can you help direct me to where I might become more versed in the subject matter. I have done some research on my own but clearly from your replies it was not adequate.

 

I can appreciate your concern. I feel you have a decent understanding of how to run an aquarium with a sump filter.

So expert to beginner can you help direct me to where I might become more versed in the subject matter. I have done some research on my own but clearly from your replies it was not adequate.

In effort to minimize technical aspects you can watch king of diy and his sump build videos. He describes the basic workings of the system. I tend to come across as abrasive but it is not my intent. I'm an engineer and I am accustomed to dealing with other engineers.

 

In effort to minimize technical aspects you can watch king of diy and his sump build videos. He describes the basic workings of the system. I tend to come across as abrasive but it is not my intent. I'm an engineer and I am accustomed to dealing with other engineers.

No worries! thanks for the help.

 

Here’s a video of my new tank up and running. Cameo of Indy Fish at the end.

 

Get a hose clamp on the overflow hose ..If that falls off the water will flow .
Do you understand how much you can fill the sump ? Have you power failure tested it yet ? Hoping your friend explained some of that ?

 

Get a hose clamp on the overflow hose ..If that falls off the water will flow .
Do you understand how much you can fill the sump ? Have you power failure tested it yet ? Hoping your friend explained some of that ?

Yeah the overflow was the only thing that concerned me. Because it is that hard plastic tubing we didn’t use a hose clamp. He had it running this way for years so I trusted his judgement.

I filled the sump from the tank overflow with the pump off. So if the power goes off it won’t overfill the sump.