How to choose filter for aefreshwater 900?

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Martinspuddle
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Re: How to choose filter for aefreshwater 900?

Post by Martinspuddle »

Fishtales wrote:
Sat Feb 29, 2020 22:27 pm
Last Triumph wrote:
Sat Feb 29, 2020 22:06 pm
Whatever filter you choose, ignore the flow rate advertised on the box - the real world, 'in service' flow will be half this at the VERY most, so for example, if your aquarium is 250 litres and you want to filter the water 6 times per hour as is a popular recommendation, you need a filter that will flow in the real world 1,500 litres per hour, which means you want to be looking at a Fluval FX4 or FX6 etc which advertise about 3,000 l/hour, which in the real world will be about 1,500.

You will hear people say that way too much filter for the tank. It's simple maths if you want the 6 times per hour cycle. Not everyone feels 6 times per hour is required, but make sure you know what you're buying and what you need from it.

I have done flow testing on a few canister filters in service, as have many aquarists on youtube and I can testify that the advertised numbers are fairy tale in the real world.
This is absolutely true. You never get the filtration stated by the manufacturer in reality. The lph is still very useful to help pick the right filter for your tank though. Most recommendations for filters I have read however have said you need a filter that states it does 4 or 5 times the amount of water per hour as the size of your aquarium, if that makes sense. I would say always ignore the maximum sized aquarium the manufacturers say the filter is suitable for.

As ever, what fish we have, and our set up will ultimately determine the amount of filtration we need.
I agree, and I always say if you need to up the circulation of your aquarium say for a high tech planted tank, never rely on the filter alone. ;)
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Re: How to choose filter for aefreshwater 900?

Post by Redpanda »

What else do I need other than filter 🙈?

I’m now reading that planted tanks need CO2?
I do really want some plants 😊

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Re: How to choose filter for aefreshwater 900?

Post by Martinspuddle »

Redpanda wrote:
Sat Feb 29, 2020 22:47 pm
What else do I need other than filter 🙈?

I’m now reading that planted tanks need CO2?
I do really want some plants 😊
Planted aquariums don't have to use CO2 there's always the low tech approach which is cheaper.
...I'm going for long drive to check if my piles to are OK :grin:
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Re: How to choose filter for aefreshwater 900?

Post by scoobiemandan »

Oase Biomaster are a very well made filter, they are German engineered after all! I ran a 350 on my 240l for a while and only stopped using because I upgraded to an FX6. The pre filter on them is an excellent and easy to clean piece of kit that makes maintaining the filter easier and should allow for longer periods between cleaning the rest of the filter! To summariser, don't discount the Biomaster in your musings ;)

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Re: How to choose filter for aefreshwater 900?

Post by Redpanda »

I read online how many people had to modify Biomaster to work properly, change media and other things. Also had lots of problems with air bubbles. I’m worried that with zero experience I’m going to be struggling there 😂 but still would be an excellent option for me as I can buy in local shop and go back anytime I have a problem.

Based on other comments Oase 600 might not have enough flow anyway ..

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Re: How to choose filter for aefreshwater 900?

Post by scoobiemandan »

I had no issues with the original sponges but did replace with pond sponges after a while but only because I wanted to make more space for biological media as it was being used on a tank with two Goldies!

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Re: How to choose filter for aefreshwater 900?

Post by Redpanda »

Hello all,

In the end I chose fx4 and now worried I made a mistake. I set up my filter yesterday and my water is like in the washing machine 🙈 the flow is way too strong for this tank. I’ve read online that you can reduce the output valve but then by how much? Is this going to affect intake? Also what’s the point having this powerful filter then if I have to tone it right down 🙈🙈

So worried what to do , any advise?

Also have loads air bubbles, will they go away eventually?

Ohh...

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Re: How to choose filter for aefreshwater 900?

Post by Stephen »

The Fluval FX4 is quite powerful at 2,650 L/h flow rate, which is why I recommended the Eheim Pro 600 at 1,250L/h.
Use a longer spray bar to reduce the flow. ;)

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Re: How to choose filter for aefreshwater 900?

Post by Redpanda »

Stephen wrote:
Mon Mar 23, 2020 14:04 pm
The Fluval FX4 is quite powerful at 2,650 L/h flow rate, which is why I recommended the Eheim Pro 600 at 1,250L/h.
Use a longer spray bar to reduce the flow. ;)

All the best
Ohh so annoying, I just never know what to do, everyone has different advice , how to know what is the right thing..🙈

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Re: How to choose filter for aefreshwater 900?

Post by mikeyw64 »

you could try throttling the output with some filter foam in the outlet (as well as a longer spray bar) however YMMV

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