Flow

[rayviv]

This topic split from Anemone Won't Anchor - Lazylivin

It sounds different when you put it like that. Like I said, "Still a rookie"!

So if I have two pumps rated @ 900gph after head reduction with, say 200gal (tank/sump) my turnover would be 4.25x per hour ?? javascript:void(0);

Could someone help me on this.     Is the above correct or not?

[slandis3]

4.5x and hour

[UD Flyer]

Ray, are the two pumps in your sump or powerheads in your tank?  If you have 200 gallons and two pumps at 900gph each you will have a rate of 9 times an hour.

If you only count the 180g's in your display tank you will have a rate of 10 times an hour.

[slandis3]

oh yea didnt catch the 2 pumps @ 900  oops

[rayviv]

Yes, its two pumps rated at 990gph @4ft head. I'm about 5ft head so I'm figuring about 900gph. With 180g tank and 55g sump and minus 150-200 lbs live rock I'm guessing about 200gal total. (all aprox)

So how did you figure that at 9x per hour? Some reason it just doesn't click for me. I see 2x 900=1800 and then I run out of road. We didn't have math in where I grew up!

[rayviv]

4.5x and hour

Hey Slandis, If you would like to move this to a more appropriate place it would be a good topic for others also.

[UD Flyer]

So how did you figure that at 9x per hour? Some reason it just doesn't click for me. I see 2x 900=1800 and then I run out of road. We didn't have math in where I grew up!

You have 1800 gph coming from your pumps and the water volume your giving us is 200. 200 gallons goes into 1800 gallons an hour 9 times. Hench the 9X turnover your tank has. 

[slandis3]

You have 1800 gph coming from your pumps and the water volume your giving us is 200. 200 gallons goes into 1800 gallons an hour 9 times. Hench the 9X turnover your tank has. 

Now you have to account for head loss so your actually getting less than that.

[Reefd Up]

Here's a head loss calculator...maybe it'll help:

http://www.reefcentral.com/index.php/head-loss-calculator

[jeblin]

It sounds different when you put it like that. Like I said, "Still a rookie"!

So if I have two pumps rated @ 900gph after head reduction with, say 200gal (tank/sump) my turnover would be 4.25x per hour ?? javascript:void(0);

If the pumps are rated @ 900GPH after head reduction, doesn't that take into effect the head loss factor?

[slandis3]

Ray is just guessing at how much head height. To get real close he needs to use the head loss calculator.You have to look and any elbows as well

[Blown76mav]

If the pumps are rated @ 900GPH after head reduction, doesn't that take into effect the head loss factor?

I beleive Ray was saying his pumps are rated at 900gph.  And after taking into consideration the head reduction his flow rate would be 4.25x  I don't think there are any pump manufactures that rate a pump after head loss, they will give you head loss in feet and height ( but in reality its different due to elbows etc..) but its not rated for X gph after head loss on the box.

[UDJustin]

head loss is expressed in feet its not a height but when your doing head loss calculations and elbow causes x amount of head loss in feet, so although it looks like they are giving you a height on the back of the box of a pump it is the in feet not a height.

[jungliztkruger]

remember you are only moving the amount of water the box says if your plumbing has double the InsideDiameter ID of the outlet on your pump. if you are not using the right size of plumbing then the flow will not be right.

I am a firm believer that your return pump should not be one of your main sources of flow... 

[rayviv]

I do not have any 90*s. I have two double 45*s on each return or 4 per line; hence a total of 8  45*s.
Longest run is 7.5 ft (left) and shortest is 7ft is (rite). So that would be 14.5ft w/ eight 45*s

I have four korilia #2 in tank for flow but don't see that they would add to the 'turnover'.

[JoeAyers]

remember you are only moving the amount of water the box says if your plumbing has double the InsideDiameter ID of the outlet on your pump. if you are not using the right size of plumbing then the flow will not be right.

I am a firm believer that your return pump should not be one of your main sources of flow... 

This is only true (sort of) if you are using a non pressure rated pump. Pressure rated pumps are designed to run what they are rated for through the diameter PVC that they are set up for.

[Blown76mav]

I do not have any 90*s. I have two double 45*s on each return or 4 per line; hence a total of 8  45*s.
Longest run is 7.5 ft (left) and shortest is 7ft is (rite). So that would be 14.5ft w/ eight 45*s

I have four korilia #2 in tank for flow but don't see that they would add to the 'turnover'.

Power heads are rated in GPH as well, they turn the water over even though its not really going anywhere.  This is what you want to use to get  X time's turnover not the return pumps.  By trying to use the return pumps for 10x turnover you will get microbubbles and cause problems.  a return pump should only supply as much water as the overflows will allow.

[rayviv]

Here's a head loss calculator...maybe it'll help:

http://www.reefcentral.com/index.php/head-loss-calculator

I fill in the info but when I hit submit it does nothing.
INFO: vert ht:5; horz ht:2.5; 45s:4; gate valve:1 Openings:1&1

[slandis3]

I fill in the info but when I hit submit it does nothing.
INFO: vert ht:5; horz ht:2.5; 45s:4; gate valve:1 Openings:1&1

Something is wrong with there site. when you add all the info just hit the enter key on the key board.
Need your pump brand and size and what size pipe you have

[rayviv]

Power heads are rated in GPH as well, they turn the water over even though its not really going anywhere.  This is what you want to use to get  X time's turnover not the return pumps.  By trying to use the return pumps for 10x turnover you will get microbubbles and cause problems.  a return pump should only supply as much water as the overflows will allow.

How do the korilias impact the quantity of h2o in tank?

[rayviv]

Something is wrong with there site. when you add all the info just hit the enter key on the key board.
Need your pump brand and size and what size pipe you have

I tried the 'enter key'--nothing.
pump is not listed but it is a Rio 20HF I used a mag9 instead. The size is 1inch   

[slandis3]

Yea its not working for me either. I would add power heads for extra flow.

[woltersb]

How does everyone have there return, power heads and overflows set up? Im trying to figure out where to put them in my 75g