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Old 06-17-2015, 05:47 PM   #1
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multipal tanks with one canister filter

i have two 55 gallon tanks and a marineland canister filter rated for 150+ gph... so my question is I'm wanting to run that filter through both tanks...? but sense there will be difference in flow... i thought i could put a ball valve inline an regulate the the flow trying to equalize the tanks... or do you think they will still overflow...? this is how i did my airlines and it seemed to work...

thanks allot...mike
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Old 06-19-2015, 09:33 AM   #2
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With two 55 gallon tanks and only 150gph you will be way under filtered.

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Old 06-19-2015, 09:45 AM   #3
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With two 55 gallon tanks and only 150gph you will be way under filtered.

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what would the recommended GPH be for each 55..? i have midevil in one an a red texas in the other...

thks...mike
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Old 06-19-2015, 10:17 AM   #4
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what would the recommended GPH be for each 55..? i have midevil in one an a red texas in the other...

thks...mike

You want a minimum of water turning over ten times an hour. So at least 550 gph per tank..preferably more because of the fish you have.


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Old 06-19-2015, 11:09 AM   #5
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You want a minimum of water turning over ten times an hour. So at least 550 gph per tank..preferably more because of the fish you have.


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I agree . Min of 10 times the tank volume for large central and south American cichlids.

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Old 06-19-2015, 11:20 AM   #6
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thanks allot for info Nigel and Mike... i appreciate it an i think i will use the canister on the 40 i have...
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Old 06-19-2015, 03:00 PM   #7
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You want a minimum of water turning over ten times an hour. So at least 550 gph per tank..preferably more because of the fish you have.


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I agree . Min of 10 times the tank volume for large central and south American cichlids.

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Personally, I wouldn't go much higher than 10x turnover per hour. Shooting for higher turnover isn't going to increase the filtering capacity of the tank, but instead will cause the fish to burn more calories requiring more food pumping more nitrates in the water.

5x - 10x the tank volume per hour are good values to shoot for.
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Old 06-19-2015, 03:38 PM   #8
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that type of set-up is just a disaster waiting to happen.
The only way you can safely run multiple tanks on one system is by utilizing a common sump and each tank would still need it's own return pump, or the tanks need to be plumbed together so the water level would equalize between the two, that would require drilling the tanks.
trying to manage both tanks with one pump/canister will surely result in floods.
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Old 06-19-2015, 04:31 PM   #9
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Personally, I wouldn't go much higher than 10x turnover per hour. Shooting for higher turnover isn't going to increase the filtering capacity of the tank, but instead will cause the fish to burn more calories requiring more food pumping more nitrates in the water.

5x - 10x the tank volume per hour are good values to shoot for.
For 90% of the average tropical and cichlids under 7" I agree with you but for a large wet pet like a midevil I shoot for 10x min. How ever I use 4 ac 50's on my 55 with the hybrid for 800 advertised gph. It's probably more like 650 with media. This way the actual turbulence in the tank isn't bad and there are no dead spots.

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Old 06-19-2015, 05:30 PM   #10
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For 90% of the average tropical and cichlids under 7" I agree with you but for a large wet pet like a midevil I shoot for 10x min. How ever I use 4 ac 50's on my 55 with the hybrid for 800 advertised gph. It's probably more like 650 with media. This way the actual turbulence in the tank isn't bad and there are no dead spots.

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so you would recommend multiple filters vs one filter per tank to get your GPH?
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