Filter Dilema...

swackett

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29 May 2008
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Epsom, Surrey
We currently have a Roma 125 with an external Eheim 2324 filter. The filter is rated at 700 lph which means we currently have 5.6 x flow.

The tank has mainly low light plants; Crypts, Java fern and Anubias and some algae, the tank is injected with Co2.


Bearing this in mind would a change of filter help?

Any thought most welcome
Ta
 

Andy Thurston

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16 Apr 2013
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If your injecting co2 you need 10x turnover to distribute the co2 to all areas of tank. But theres less chance of co2 problems in a low light tank. What lights do you have?
 

swackett

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I am thinking of a eheim 2173 which is 1050 lph which is 8.6x flow, although not 10x do you think it will be okay?
 

foxfish

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Well no, at least not in an ideal world, as the recommended, tried & tested formula is 10 x .
You could use additional flow via a powerhead or similar pump.
 

foxfish

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Yes - plants can still grow fast & healthy with very low light, in fact low light is recommended with C02 injected tanks.
If you are going to try for a lovely planted tank then you need to follow the right advice...if you compromise or deviate from the correct standard formula then expect a rough ride.
The truth is 8.5 might well work if you can match everything else required!
However why would you even try! just read through this forum to see that growing plants is not about compromise but getting the basics into perspective...there are lots of experienced guys on board & I think all of them will say 'use 10 x flow to be safe'....up to you at the end of the day.
 
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Ady34

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You could also buy something to match your 700lph filter and run 2 filters. This would give you a little extra flow and perhaps save you a few quid?
 
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