Canister Filter Size

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Zhewitt04

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Oct 22, 2015
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I am setting up a 240 gallon tank. I am just starting and have a canister filter on it. Its a 750 gph (head loss not accounted for so probably more like 600 gph) canister. Its a cheap Chinese knockoff. I was going to get another one soon to complete the filtration. My point is I don't understand why we need these huge canister filters. The point of these filters is for biological filtration. With all the media in the filter and the items in the tank like driftwood, sand, equipment, and such do we really need that much in the size of a canister? I have seen these canister filters online that are 35" tall and when I got to thinking about it, it doesn't make sense. I have seen this marine pure media that has a absolute a ton of surface area. These blocks or spheres are not big in size compared to there surface area so if you have one filter with that media in it then that's all you'll need, throw a sponge in the media in front of it to keep debris out. Why do some insist on having multiple filters?
I do understand the purpose of 2 filters so when you clean on the other is still running and doesn't effect your bacteria population. Minus this point though I think some put to much stalk in the size of the filter and not the purpose.
Please experts chime in and let me know what your thoughts are and if I am over looking something or being blind to a obvious issue that I have not covered.

I am not being mean or anything I just got to thinking and wanted to share my thoughts and get some feedback on why I may or may not make since.
 
what type of can is it? that's a pretty decent claimed gph...

I run multiple filters on all my tanks that don't have a sump. What are you doing for mechanical filtration if your cans are only stuffed with biomedia? you need mech and bio...hence multiple filters.

one filter pad in a can is going to jam up within a few days so unless you want to clean it every week I'd suggest multiple filters, preferably HOB's if your tank allows, solely dedicated to mech filtration to make maintenance easier.
 
predatorkeeper87 said:
thank you...I knew I wasn't being crazy. I don't even think my FX6 with only bio is doing even close to that.
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Am i missing something? It cleary says 750 GPH that is gallons per hour not ounces. I never said ounces...... I then stated it was 700 not 750.
 
predatorkeeper87 said:
what type of can is it? that's a pretty decent claimed gph...

I run multiple filters on all my tanks that don't have a sump. What are you doing for mechanical filtration if your cans are only stuffed with biomedia? you need mech and bio...hence multiple filters.

one filter pad in a can is going to jam up within a few days so unless you want to clean it every week I'd suggest multiple filters, preferably HOB's if your tank allows, solely dedicated to mech filtration to make maintenance easier.
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As you can see from the link it has a prefilter sponge on it and it has several different layers and different sponges and poly filter in it.
 
Zhewitt04 said:
Am i missing something? It cleary says 750 GPH that is gallons per hour not ounces. I never said ounces...... I then stated it was 700 not 750.
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no no...the ounces thing was probably a typo on his end...I am saying 750 gph is huge for a filter like that...especially an odyssea, and it surprises me they'd claim that.
 
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Zhewitt04 said:
As you can see from the link it has a prefilter sponge on it and it has several different layers and different sponges and poly filter in it.
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then it isn't set up for bio and if its the only filter on the tank, depending on stock, that thing will jam up SUPER quick. My fx6 used to be nothing but pads and floss and within a week or two of cleaning it the flow was super restricted and needed cleaned again. Now I have it filled with bio and two HOB filters for mech.
 
I have the 700 and 2
predatorkeeper87 said:
thank you...I knew I wasn't being crazy. I don't even think my FX6 with only bio is doing even close to that.
Click to expand...
Manufacturers always exaggerate the numbers, just a marketing ploy. Plus, they probably claiming these numbers based upon just the pump alone, no head loss no media involved. This is prevalent in all various industries.
 
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