How much filtration for a tank
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How much filtration for a tank

This is a discussion on How much filtration for a tank within the Saltwater Aquarium Equipment forums, part of the Beginner Saltwater Aquariums category; --> Hello, I recently started a 144 half circle saltwater aquarium. I have a small eheim canister, and a cascade filter all rated for 150 ...

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How much filtration for a tank
Old 04-30-2008, 09:22 AM   #1
 
How much filtration for a tank

Hello,

I recently started a 144 half circle saltwater aquarium. I have a small eheim canister, and a cascade filter all rated for 150 gallons. I have just added another eheim canister wet/dry filter but i have noticed that with the new filter the water returning resulting in causing fine bubbles (almost like salt particles). Is this too much filtration for the tank? I will take any suggestions.

Thanks
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Old 04-30-2008, 10:24 AM   #2
 
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I don't believe it's too much filtration, I'm a firm believer in having several filters or one rated for a tank much larger than the intended tank.

However, in your case I will say that the wet/dry is causing microbubbles and with SW tanks, specifically with fish, this is not good. These microbubbles can actually kill the fish over time.

With a tank that size I'd personally set up a sump for the filtration, so I'm not sure what to suggest for replacement of the W/D filter.
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Old 04-30-2008, 10:30 AM   #3
 
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Thanks for the response. I just took the new filter offline.. I will see how it does and i am considering take another filter offline and trying to get this one going again..It is suppose to be rated as a top filter.
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Old 04-30-2008, 11:01 AM   #4
 
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I agree with MattD.... canister filters alone are not going to be enough to keep a tank of that size running and stable. Large tanks such as that should really have a sump system along with a protein skimmer and UV if you can afford it.
At very least, please be sure there are power heads in the tank to provide enough circulation in that tank. You will find you'll probably need up to 4 powerheads to get good circulation.
Canister filters can only do so much, and to be effective all of the water has to push through them. Spray bars alone are not going to generate enough circulation to move all of that water through a canister filter. Without the powerheads you will eventually notice "dead spots" and can expect cyano bacteria blooms as time goes on. Nitrifying bacteria need plenty of circulation to grow and reporduce at a healthy rate to keep up with any waste levels in the tank.
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Old 04-30-2008, 12:42 PM   #5
 
Hello. Thanks for the response. I do have a protein skimmer runnign which i have forgot to mention. The reason i got the the eheim canister wet/dry was because it does everything that a regular wet/dry does. It suppose to promote the health and growth of nitrfying bacteria. I am wondering why i have the microbubbles forming.
Again thank you for the input.
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Old 04-30-2008, 09:46 PM   #6
 
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Quote:
Originally Posted by sanil
Hello. Thanks for the response. I do have a protein skimmer runnign which i have forgot to mention. The reason i got the the eheim canister wet/dry was because it does everything that a regular wet/dry does. It suppose to promote the health and growth of nitrfying bacteria. I am wondering why i have the microbubbles forming.
Again thank you for the input.
The Eheim wet/dry will put bubbles into the tank. The canister pumps water to the tank emptying the canister most of the way, then gravity fills back up. As the water level increases in the canister, most of the air in the canister is pushed out thru the breather tube. The Float in the side cylinder rises. When it gets to the top of its compartment it triggers the pump to push all the water out again. There is still some air in it when the water is pushed back to the tank and it takes some of the air with it. Any other pumps or filters can suck in the bubbles and chop them up then spit the back to the tank as micro bubbles.
Depending on the water's surface tension (surface tension is created by high organic levels, oils, phenols, medications, etc, etc) most protein skimmers will dump microbubbles back into the aquarium.
You can pinpoint the source by turning off filters one by one until the microbubbles subside. try combinations of the filters and pumps.
for us to tell what is causing it we would need a good video (mpeg or avi) of the tank showing the filter outlets somewhat up close.
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Old 05-01-2008, 11:35 AM   #7
 
Hello Dawn... Thanks for the response. After taking the wet/dry offline the microbubbles have virutally disapperared. I am going to try and turn off each filter and start with the wet/dry and work my down to see if i can get a good balance and see what the issue may be.
Thanks for the help.
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