300 litre tank filter. - The Planted Tank Forum
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post #1 of 4 (permalink) Old 09-20-2019, 09:14 AM Thread Starter
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300 litre tank filter.

Hi all.

I will soon be getting a 5ft aqua oak aquarium with a water capacity of just over 300 litres.

I am having difficulty in deciding what external canister filter to use to give me a decent waterflow for a planted tank with a few small fish set up.

There are the Fluval 407, Fluval FX4, Oase Biomaster 600, filters in my mind at the moment. But all these seem to have potential issues with me.

Would the Fluval 407 or Oase Biomaster 600 actually give me enough waterflow, or the Fluval FX4 give me far to much flow and make it difficult to keep plants in the substrate and fishes being swept to one end of the tank.

Are there any others readily available?

Due to expense and room I only want to have one filter and they need to have replacement filter media readily available.

What do you think would best for my set up to be.
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post #2 of 4 (permalink) Old 09-20-2019, 01:03 PM
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There is no such thing as a filter with too much flow because you can simply adjust the flow down. There is such a thing as not enough flow. If you are trying to filter 5 feet of planted tank you need a lot of flow to reach the other side. Go big.

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post #3 of 4 (permalink) Old 09-21-2019, 04:30 PM
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I agree, get the cannister with the most flow. I would doubt it will be too much on a 300 liter tank.You can divide the output to each back corner for gentler flow. Have one pointed across the back of the tank and the other pointed toward diagonally to the center of the front glass to achieve a nice circular flow. You could add a ball valve on each one for more control.
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post #4 of 4 (permalink) Old 09-21-2019, 09:28 PM
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FX4 (1700 l/h actual circulation) would not be to much, but it is to much on one output for small fish and plants. Youíll need to break it out into 3 outputs of around 550 l/h, say spraybar down back wall in center and a nozzle in both top corners blowing around front wall.

Iím seeing a 150x45x45cm tank if Iím looking at right one. 60x18x18Ē roughly. You have to consider covering 45cm front to back and also the depth top to bottom of water column top to bottom. Itís as much about circulation patterns and coverage as it is about turning tank volume over a certain amount of times per hour.
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