filters don't make sense!!!!!!!!

  • We are currently upgrading MFK. thanks! -neo
O

oscaroo

Feeder Fish
MFK Member
Sep 5, 2011
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USA
the api filterstar xpl is 350 gallons per hour and rated for 175... api xpm rated for 75 gallons and flow rated 300 gallons per hour... only 50 gallon diffrent and over twice as much... the xpl is bigger and has more media space witch helps but i would not think a filter that is a little larger with 50 gallons more flow rate would filter twice as much... why? inconsistant ratings or a other reason...????:confused:
 
Haven't you learned not to listen to manufacturer's ratings?
 
in a word.....marketing

The XPL(XP3) actually moves 187pgh with media and the XPM(XP2) moves 147gph loaded. As to why such a large jump from the M to the L, couldn't tell you other than when I buy a canister I look for the actually flow, loaded, and buy based on my needs, not the manufacturers suggestions.

Manufacturers use empty canisters to come up with the flow rates. They can advertise that the pump moves x amount of water, but in reality it's usually much less when pushing through media and hoses. FX5 is rated at 925 gph on the box but real world is 600gph. Eheim is the same
 
I thought Eheim actually tested their filters fully loaded...:confused:

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technically they all do because the flow numbers I got right off the Rena boxes. You just have to look at the fine print lol. I could be wrong on Eheim but I know at one point the advertised flow and actual was different for them as well. They might have changed it....

Havne't bought a canister in awhile ......
 
Stock has every thing to do with it. Lol if it says it can handle 100 gal tank that's fine but what does it say is in side the tank? Has any one ever read. About the hypothetical volume of water u can over stock more fish as long as the water quality holds up and there is space. Becuz if the flow rate is x times the total tank volume and the filter is cleaning it correctly then in 1 hour the water that passes thru the tank is. Tank size times x amount it's been filtered in an hour Or to put it simply. If u had a 1000 gal pond. And the water was clean. And u used it to fill up a 100 gal tank u could fill the tank 10 times with clean water putting the fish thru 1000 gal Of clean water in the time it took u to pore all 1000 gal of water. Soooo if u did all 1000 in 1 hour that's 10 times the volume of the tank in clean water as long as the bio load is able to clean it does that make sence?


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Also, you need to keep in mind that there is more that goes into filter rating that just gph. You also have to look at the mechical filtration capacity and the biological media capacity. You are paying for both increased media capacity and flow capacity.
 
Pharaoh said:
Also, you need to keep in mind that there is more that goes into filter rating that just gph. You also have to look at the mechical filtration capacity and the biological media capacity. You are paying for both increased media capacity and flow capacity.
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good point
 
get an ac110 and a sponge filter and can the can.....:)
 
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