Good external filters? - Tropical Fish Keeping - Aquarium fish care and resources
  • 1 Post By Sanguinefox
LinkBack Thread Tools
post #1 of 7 Old 03-27-2013, 09:14 AM Thread Starter
New Member
Good external filters?

Hey guys,

I know someone who has a Juwel Trigon 350 tank (one of those corner/crossbow ones) and i'm helping them out with setting it up.

We're going to turn this into a Discus tank, we are either going to have 7 Adult Discus fish in there or 15 small ones (i know this sounds insane, but we will be giving them back to the lfs as they start growing and swapping them for smaller ones to put back in).

What i'm looking for is an external filter (Don't really rate the internal one) which will do a really good job for these Discus and will also keep the water crystal clear throughout the week , water changes will be done weekly of 40% (probably more), preferably i'd like the filter to be under £110 but if it's something exceptional i might be able to convince the owner to go a little further

Oh before i forget, the tank is fully cycled and the PH/KH of the water are on the required levels for the discus.

Any recommendations would be much appreciate!
Squasedpotato is offline  
Sponsored Links
post #2 of 7 Old 03-27-2013, 10:17 AM
JDM's Avatar
That's about 92 US gallons for those non-metric out there.


Total years fish keeping experience: 7 months, can't start counting in years for a while yet.

The shotgun approach to a planted tank with an LED fixture

Small scale nitrogen cycle with a jar, water and fish food; no substrate, filter etc
JDM is offline  
post #3 of 7 Old 03-27-2013, 11:15 AM
jentralala's Avatar
I don't have any personal experience with discus but from what I've read they require/appreciate more water changes of a larger volume. Somewhere around 3x a week, 50% of the volume. But that's just bits I've picked up here and there, I'd make sure one WC is enough. They're sensitive guys.

Anyways, by external to you mean canister? I'm not sure if I know of a canister that can filter that much water that's around your price range. You could check online classifieds to see if anyone's selling one. If you mean HOB or canister, definitely go with a canister. They filter the water much better and are pretty much dead silent in a room. I've had experience with both and I adore my canister. So much easier to clean and I love being able to choose the media I want to use, instead of using cartridges.

AquaClear HOBs are a bit different, as they have a basket that you can put whatever media you want into, and I have one. I still prefer my canister over it. It is one of the better HOBs out there though.
jentralala is offline  
post #4 of 7 Old 03-27-2013, 11:42 AM
I'm a fan of Hagen's Aquaclear (now marketed as Fluval Aquaclear) HOB filters as unlike cartridge filters, we can decide the type and volume of the media to use. I have two AC70's on my 60g, one is a dedicated bio-filter and the other is just mechanical.

As for canisters, Eheim, Rena and Fluval are generally considered the top contenders. Although cost is always a consideration, "good tools aren't cheap and cheap tools aren't good"...Sometimes it pays big dividends to pay a little more to have a high quality filter that will run quietly and trouble free for years.

Some folks (not me) have made great finds on used equipment. Sadly fish keeping is all too often a short lived hobby and some folks will sell perfectly good setups together or in pieces. You might find something this way.

[thinking out loud]-> I also know that it is often said that Discus require extreme water changes. Still, I wonder if this is largely due to the simple truth that our aquarium filter systems just don't filter/purify the water well enough.


Father Knows Best but Abbey knows everything! I once knew everything, then I asked one question.
` •...><((((º>` • . ¸¸ . • ´` • . . . ¸><((((º>¸ . • ´` • .. . ¸ ><((((º>

Last edited by AbbeysDad; 03-27-2013 at 11:45 AM.
AbbeysDad is offline  
post #5 of 7 Old 03-27-2013, 04:24 PM
jentralala's Avatar
Oh, I would also recommend LOTS of live plants, as I do believe Discus have a pretty large bioload. Floating and fast growing stems are your best bet with helping to control ammonia/nitrate/nitrite. The fish will also appreciate the foliage.
jentralala is offline  
post #6 of 7 Old 03-27-2013, 04:34 PM
As much maintenance as the person is going to have to with water changes alone, I'd caution to stay away from Aquaclears. With the bioload going on they are going to need a lot of maintenance.

I know when I finally got a canister for my 150 I went with: Rena Filstar XP 3. I have a second canister on this tank but that aside, this one is fairly easy to use and there are places online selling it for a reasonable price. Be wary you may have to buy the spray bar extra because what it comes with at the cheaper prices is going to potentially have too much flow for the discus.

You could probably do really good planting, frequent water changes and go with the Rena Filstar XP 2.
jentralala likes this.
Sanguinefox is offline  
post #7 of 7 Old 04-04-2013, 07:40 PM
Byron's Avatar
I agree. Given the fish (discus) and the tank size, an external canister is frankly the only option.

The Rena Filstar XP series are good filters, I have the XP3 on my 115g. Probably not as well made as the more expensive Eheim canisters (of which I have 2), but they do the job.

On the issue of plants and water changes for discus, there are varying views, with equally varying degrees of success depending.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
Byron is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Eheim external filters, which one? Gramayr Freshwater Aquarium Equipment 6 10-19-2011 04:08 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome