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Eheim Class 350 vs Fluval 205

Choice of filters for mid sized tank

  • Fluval 207

    Votes: 5 83.3%

  • Eheim Classic 350

    Votes: 3 50.0%
  • Total voters
    6
Aqua sobriquet said:
Ah well, it’s relative. Maybe if I saw them in the flesh so to speak I’d agree with you?

Edit: This is my old inlet pipe you asked about. I’ve got a lathe so I turned the Red plastic plug to close off the skimmer inlet.
I felt the stainless mesh shown was still a bit too coarse to stop baby shrimp being sucked up which is why I now use sponge instead.
It also obviously adds extra filtration. You live and learn.

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Thank you. I just noticed that there was bit of a noise from my Fluval 207. It's very low, but in a quiet environment I can hear it. I replaced the pre filter sponge with a one thats slightly bigger. That didn't stop the noise. The flow is unaffected and when I placed my hands on the filter, I didn't notice any vibration. So what could be the reason for the noise? My Eheim Classic 250 is super quiet. Its not that the noise is disturbing, but my concern is that its not because of some problem with the impeller, that might create problem in future.

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It was just a tight push fit. To be honest you could just jam some fine sponge in there.
I bought my Fluval partly because some folks said they were quiet. Sadly mine wasn’t, and no obvious faults could be seen.
 
Good suggestion besides suppressing the sound that sponge can also add one extra layer of filtration. So I should place that sponge on the top chamber right above that carbon filter?
 
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maverick786us said:
I think when I clean my filter I will replace those crappy foam with coarse filter pads
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In my opinion a coarse filter sponge does the best job for filtering. There is no need for any other filter media. It rarely clogs up and it is always guaranteed that a flow takes place. I use a combination of 10 ppi and 20 ppi in all my filters. Absolutely stress-free with very good results. Crystal clear water is guaranteed with a matured filter. I use a small 30 ppi sponge as a pre-filter, which I clean every week. The most important thing is to get a mature filter. And it takes some time.

But we all know that: Aquarists are the most patient people in the world. There is no one who could be more patient. That is the truth. 😉
 
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maverick786us said:
What I don't understand is why these performance filters have foam at first place? its the worst filter media IMHO
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No. It`s the best media. I've only been keeping aquariums for about 55 years. And in that time I haven't found anything better. But of course you can stuff anything into your filter. Somehow it will work. And I don't believe in advertising promises. Only in what I see and can understand.
And I have the best conditions in all my aquariums for the creatures living in them. No unexpected losses. No algae. No cyanobacteria.
 
Teleos said:
No. It`s the best media. I've only been keeping aquariums for about 55 years. And in that time I haven't found anything better. But of course you can stuff anything into your filter. Somehow it will work. And I don't believe in advertising promises. Only in what I see and can understand.
And I have the best conditions in all my aquariums for the creatures living in them. No unexpected losses. No algae. No cyanobacteria.
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Ok I don't want to contradict your point, but how is it the best media, when it clogs so fast and cannot be reused, I have seen that after 2-3 months of usage it has to be dumped.
 
maverick786us said:
Ok I don't want to contradict your point, but how is it the best media, when it clogs so fast and cannot be reused, I have seen that after 2-3 months of usage it has to be dumped.
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I use 10ppi and 20ppi sponge. These sponges rarely clogs up. 10ppi never clogs up. And I reuse all my sponges for more than 5 years now. And they are really easy to clean.
 
maverick786us said:
I was talking about crappy foam, I know coarse sponge with low PPI provides best mechanical filtration
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I have no crappy foams. Coarse sponge is the best for biological and mechanical filtration. And a special biomedia does not exist. Every filter media always functions as a biological media. Sometimes more, sometimes less well. If no water flows through, it does not work at all. However, the manufacturers of filter stones don't want to hear that. They prefer to sell what the customer wants to believe. There is no room for biology. There are only untenable advertising claims. But as I said, somehow anything can work. Do what YOU like!
 
I can’t remember the exact recommendation for canister filter load out for the Eheim Classics back in the day (1980’s).
But I remember that filter Floss was the last part, at the top of the canister. This invariably meant that unless you changed the Floss very often, the Biomedia below it got covered in detritus.

Edit: Eheim still recommend a fine filter at the top.

 
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Teleos said:
I use 10ppi and 20ppi sponge. These sponges rarely clogs up. 10ppi never clogs up. And I reuse all my sponges for more than 5 years now. And they are really easy to clean.
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To make a few things clear. I do not use external filters. That's why I always have easy access to the top filter material. And that's why I use a 30ppi sponge first. This is not possible with an external filter. Unless you use a pre-filter. Btw. foam or sponge is for me the same thing.

Of course, you can discuss filters and filter media endlessly. But I don't feel like doing that.

Everyone who operates a filter, i.e. almost everyone, should first and foremost be clear about what needs to be filtered and in what quantity. And at this point, this thread would go off track. Perhaps we can discuss elsewhere what actually happens in a filter and how much filtering is necessary and sensible. Just to add, the nitrification is the least of the problems in a planted tank.
 
In my Biomaster 350 I have 45ppi foam in the pre-filter, then 30ppi in the bottom tray, then 20ppi above that. Next comes Siporax and the top tray has a sachet of Prime covered with a thin piece of 20ppi to hold it in place. The inlet pipe has 40ppi foam over it to stop shrimps being sucked up.
I think I should really swap out the 45ppi pre-filter foams with 30ppi at some point?
 
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