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At what point, in gallons, should I switch over to a canister filter? Thanks.

Chris

I think 55 gallons. I have a cannister for my new 55g and I love it.

You really should have a cannister on anything about 80 gallons and above though. Some power filters are rated above that, but it would be cutting it close. You should try to get a filter rated close to double the tank size.

*Kristin*

You don't have to get a cannister for any tank. A lot of people use two emperor 400s on a 125 that I know of, and it works out well for them. You can always double up like that. Cannisters are nice though, and can be used on smaller tanks like 29s or 30s maybe smaller.

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Critical Fertilator: The Micromanager of Macronutrients

I've had an AC 110 running on my 75g for a year and a half. Within the next few months I'll be adding another. I considered a canister but I've been very happy with the AC so I'll stick with that.

There are other things to consider other than gallons. What's stocked of the tank, and not just numbers of fish or inches. The waste put out by a large cichlid and that put out by a school of neons varies greatly, even if they're equal in inches. Frequency of water changes should be taken into account as well.

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There is water at the bottom of the ocean

The smallest Eheim I think is the Ecco 2231 which is for up to 35 USgal. Going by that there seems to be no low figure just an "up to".
If there was a suitable one for my Betta tank I would certainly use it but the out put would be too strong there fore I have to use an internal with a directional flow which also adds extra air.

Have a look in [link=My Profile] http://www.fishprofiles.com/forums/member.aspx?id=1935[/link] for my tank info

Look here for my
Betta 11Gal Desktop & Placidity 5ft Community Tank Photos

Keith

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I was a little tired when I wrote my above post. It is true that you don't have to have a cannister on anything. I was thinking more about convenience and efficiency though. I think it would be more convenient to have a cannister on tanks over 100g just because you could only use one. I don't know anything about emporer filters, so I didn't know they could be used for larger tanks. Guess I should've done more research before jumping in.

I personally would love to have a cannister filter on all my tanks...if I could afford it. I love mine. Its so much quieter than my AC filters. No dripping noise at all./:'

*Kristin*

I have hang on the back filters on all my tanks. Which are 3 29 gallons, 1 33 gallon and 3 10 gallons. All thosetanks have more then one filter if it's rated for it or higher. Everything works well. I just recently picked up at my LFS Fluvals discontinued line of canister filters....101 204 304 and so on. I bought 6 filters for $300! Since they discontinued them my LFS had a sale on top of the reduced price as well! Can't wait to hook them up as well

If it holds water and it's glass I want it!

i have a furval 404 on my 10 gallon, on low power, i have another furval 404 on a 55 high, and an ehiem pro 2 on a 75,125.

i agree with an earilier post, 55 should be ok to run on full all the time.