fluval FX5/6 vs. fluval g6 vs. sump - The Planted Tank Forum
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post #1 of 30 (permalink) Old 07-13-2013, 03:17 PM Thread Starter
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Question fluval FX5/6 vs. fluval g6 vs. sump

what one would you guys recommend for a 120G tank? all i have on it is 2 HOT magnums 250, i was looking to upgrade cause my tank is always looking a little bit cloudy

i have never used or seen a talk with one used, so all your help would be great thanks, wade

Last edited by wsharp; 07-18-2013 at 12:16 AM. Reason: added info
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post #2 of 30 (permalink) Old 07-13-2013, 03:34 PM
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Buddy has a G6...Always having issues. A quick amazon search, and you'll be explained the constant problems. The Fx5/6 had issues with micro bubbles, traced back to a seal.

Mine is working great.
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post #3 of 30 (permalink) Old 07-13-2013, 04:33 PM Thread Starter
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i was thinking i was gona go with the fx6 seeing as all of those filters are just about the same price give or take about $20

but i just wanted more insite and reviews from people on here to see what you guys/gals had to think about them
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post #4 of 30 (permalink) Old 07-13-2013, 07:38 PM
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Don' have a Fluval so I can't comment on them. I am currently running a Rena xp3 on a 125g and love it. Quiet and lots of room for media. Has great flow and comes with several options like spray bar and such. Was running 2 HOT magnums and it was a constant chore to keep the filters working at peak performance (cleaning every other week) vs. cleaning once every couple of months with the Rena.


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post #5 of 30 (permalink) Old 07-13-2013, 10:11 PM Thread Starter
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will keep that in consideration... ive never used a rena before, is that all ur using? or still both hot magnums as well??

Last edited by wsharp; 07-14-2013 at 02:53 PM. Reason: cant spell right on my iphone
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post #6 of 30 (permalink) Old 07-14-2013, 02:54 PM Thread Starter
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anyone else using any of these big filters?
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post #7 of 30 (permalink) Old 07-14-2013, 03:19 PM
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I'm using the rena xp3 for filtration and 2 powerheads with sponges to help with circulation. So far it is working out great.


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post #8 of 30 (permalink) Old 07-14-2013, 04:45 PM
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Had a G6 and a G3 for years. Never had a problem with either. Great filters. Very reliable, very easy to maintain. The pre-filter is likely to clog on a heavily planted tank quickly. Mine needs to be changed weekly, which takes 2 minutes to do. I have multiple cartridges and just replace when necessary and clean the old one when I get around to it. Flow stays high, water crystal clear.

For full maintenance, it's easier than the XP, or Eheim 2076 that I had previously because the gasket seats much more securely and the locks are much more positive and sturdy than other canisters.

The G3 Pre-filter is only changed once every 4-6 months. It's a less heavily planted tank, but still has a heavy fish load. No problems ever.

The only challenge with the G6 for your application is throughput. I think it would be borderline fir a 120. Having said that, a single canister of any kind is borderline for a heavily loaded 120. My G6 has more flow than the equivalent Rena and Eheim because flow is always at max since the pre-filter is so easy to maintain. In the other, traditional designs, the filters clog gradually over time, So flow is below max most of the time.

FX5/6 would be good, but they are big, heavy filters to lift out of a cabinet while full of water. Not so easy to maintain. The Gs are fast and easy compared to all equivalent models.

You might want to consider a sump for large capacity and ease of maintenance.


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post #9 of 30 (permalink) Old 07-14-2013, 08:31 PM
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Interesting thread. Owned a fx5 on my 125 for about 4 years. Had the micro bubble problem so finally I tinkered with everything, including taking off the motor and cleaning the impeller, big mistake. After that it was noisy as hell. So I tinkered more. Eventually the thing died. I read that if you don't put the motor back on exactly it will do what happened to me above. That was 6 months ago. Got a sunsun and imo its a peice of crap. I've been complimating what to do next. I've been thinking about a Rena but afraid it's just going to be like a SunSun. I liked the filtering of the fx5 did but afraid of repeating history.
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post #10 of 30 (permalink) Old 07-16-2013, 02:13 AM Thread Starter
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any other input on a good filter for a120 gallon tank??
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post #11 of 30 (permalink) Old 07-16-2013, 03:35 AM
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A sump.

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post #12 of 30 (permalink) Old 07-16-2013, 11:14 AM
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Ive had a FX5 for years and the no probs on the 150G. Ive pulled the motor/ impeller out and back in no problem. Was thinking of replacing the impeller just because its 3 yrs old not but thats just general maintenance stuff. Cleaning is easy enough but i only clean the sponge as required. Had a resun and they should be called crappy leaking filter. Just bought a 2nd hand 2217 for the Peppermint Bristlenose tank because they have a good wrap.

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post #13 of 30 (permalink) Old 07-16-2013, 11:58 PM Thread Starter
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i would sump but what size tank would i need for this? and i dont know anything about sumps and dont want to spend a poop tons on one...

more info on sumps would be sweet

Last edited by wsharp; 07-17-2013 at 02:52 AM. Reason: idk
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post #14 of 30 (permalink) Old 07-17-2013, 03:12 AM Thread Starter
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would a 29G tank be big enough for a sump on this tank??
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post #15 of 30 (permalink) Old 07-17-2013, 03:15 AM
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I had 2 Rena xp3 on my 125 but had some dead spots so I replaced it with a FX5 and made a DIY spray bar to go the whole length of the tank , no more dead spots and tank is always clear.

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