turnover ratio How do you figure it

Ricky1066 · 02/20/2008, 09:26 AM

I hear it alot I knwo it means how many times you water is rinsed and sent back But how do you calcualte how much you should do it and how much it actually does?

The_Browns · 02/20/2008, 09:37 AM

Total GPH going through your system / Number of gallons your tank is

I can't remember but I think that is correct

Toddrtrex · 02/20/2008, 09:41 AM

If you want to know the turnover of the tank itself, add up all the power heads and returns and divide that by the tank size.

An example -- In my 58
1 super flow --- 1600 gph
1 Seio 820 --- 820 gph
1 Seio 620 --- 620 gph
Return pump --- 400 gph (( throttled back a bit and guessing at the head loose

So, 3440 gallons per hour divide by 58 gallons equals 60 X turnover ( rounded up )

Ricky1066 · 02/20/2008, 09:43 AM

yes but how do you figure what is going through your sytstem

InLimbo87 · 02/20/2008, 09:50 AM

The powerheads/water pumps are usually given a rating of how many GPH they produce. You then divide the total of all flow sources divided by the total water volume in your system.

The idea here is that you're given the gallons per hour, and how many gallons are in your tank. Then you find out (basically) how many times that flow "turnsover" your tank in an hour. Its just a basic measure to determine how strong the flow is on the whole for your tank.

Toddrtrex · 02/20/2008, 09:52 AM

If you mean just through you sump, just use only the return pump.

In my case 400 divided by 58 would be 7 X turnover (( again rounded up ))

evoracer · 02/20/2008, 09:59 AM

You are going to have head loss and actual milage may vary. But it is just an estimation anyway. You can get the data sheet on your pump and figure your actual flow rate with given head loss. No one knows the "right" amount of turnover needed. The more the better in MOST instances. Enough flow to not have any dead spots is the main goal. Also, some corals need heavier flow, some less. Through your sump and/or refugium generally under 10X per hour is ideal, and the more the merrier in the tank, assuming you don't have any low flow corals in direct flow. You don't want to blow your fish againt the glass either!!!!

02/20/2008, 09:26 AM	#1
Ricky1066 Registered Member Join Date: Jan 2008 Location: Brooklyn Posts: 1,029	turnover ratio How do you figure it I hear it alot I knwo it means how many times you water is rinsed and sent back But how do you calcualte how much you should do it and how much it actually does? __________________ 75gallon,75lbslr 60pdls, clown,yellow tang.3 cardinals.royal gamma,3 chromis,blenny,torpedo,cleanershrimp Current Tank Info: 75 gallon salt water starter

02/20/2008, 09:37 AM	#2
The_Browns Registered Member Join Date: Sep 2007 Location: Winter Garden, FL Posts: 1,046	Total GPH going through your system / Number of gallons your tank is I can't remember but I think that is correct __________________ Mike & Jenn Current Tank Info: 120g DT and 35g frag tank

02/20/2008, 09:41 AM	#3
Toddrtrex Registered Member Join Date: Feb 2004 Location: Carol Stream, IL Posts: 23,162	If you want to know the turnover of the tank itself, add up all the power heads and returns and divide that by the tank size. An example -- In my 58 1 super flow --- 1600 gph 1 Seio 820 --- 820 gph 1 Seio 620 --- 620 gph Return pump --- 400 gph (( throttled back a bit and guessing at the head loose So, 3440 gallons per hour divide by 58 gallons equals 60 X turnover ( rounded up ) __________________ Click my name and then "visit toddrtrex's homepage" for tank pictures Current Tank Info: 210g reef and 65g reef

02/20/2008, 09:43 AM	#4
Ricky1066 Registered Member Join Date: Jan 2008 Location: Brooklyn Posts: 1,029	yes but how do you figure what is going through your sytstem __________________ 75gallon,75lbslr 60pdls, clown,yellow tang.3 cardinals.royal gamma,3 chromis,blenny,torpedo,cleanershrimp Current Tank Info: 75 gallon salt water starter

02/20/2008, 09:50 AM	#5
InLimbo87 Registered Member Join Date: Jun 2006 Location: Central FL Posts: 3,197	The powerheads/water pumps are usually given a rating of how many GPH they produce. You then divide the total of all flow sources divided by the total water volume in your system. The idea here is that you're given the gallons per hour, and how many gallons are in your tank. Then you find out (basically) how many times that flow "turnsover" your tank in an hour. Its just a basic measure to determine how strong the flow is on the whole for your tank. __________________ We are forever responsible for that which we tame... Current Tank Info: 90 gallon

02/20/2008, 09:52 AM	#6
Toddrtrex Registered Member Join Date: Feb 2004 Location: Carol Stream, IL Posts: 23,162	If you mean just through you sump, just use only the return pump. In my case 400 divided by 58 would be 7 X turnover (( again rounded up )) __________________ Click my name and then "visit toddrtrex's homepage" for tank pictures Current Tank Info: 210g reef and 65g reef

02/20/2008, 09:59 AM	#7
evoracer Registered Member Join Date: May 2006 Location: San Luis Obispo, CA Posts: 571	You are going to have head loss and actual milage may vary. But it is just an estimation anyway. You can get the data sheet on your pump and figure your actual flow rate with given head loss. No one knows the "right" amount of turnover needed. The more the better in MOST instances. Enough flow to not have any dead spots is the main goal. Also, some corals need heavier flow, some less. Through your sump and/or refugium generally under 10X per hour is ideal, and the more the merrier in the tank, assuming you don't have any low flow corals in direct flow. You don't want to blow your fish againt the glass either!!!! __________________ ______________________________________________________ Jeremy Second-Decade Club!