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One filter or two?

Mouse

New Member
Joined
20 Feb 2021
Messages
7
Location
Ireland
Hi everyone I have a 5 foot tank and going to go down the road of Aquascaping and I bought the 850 biomaster thermo, is one good enough to run a 5ft tank or will I need two of them thanks in advance Aidan


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Shane1094

Member
Joined
13 Feb 2021
Messages
30
Location
Powick
What's the tank volume? Oase 850 is around 1500L/H I think but you can slash that through gravity being under tank etc and any further inline equipment. With 5ft tank I'd be inclined to maybe use a cheaper filter to help with flow/circulation. Or even a wave maker/pump ?
 

sparkyweasel

Member
Joined
30 Jun 2011
Messages
1,945
Will you be injecting CO2? If so a good guideline is to have the rated flow at 10x tank volume per hour. That flow can be from the filter(s) alone, or filter plus circulation pump.
Rated flow, as in what the maker claims, - the actual flow will usually be a lot less.
 

Driftless

Member
Joined
4 Jul 2020
Messages
160
Location
Chicago-area
I run two filters on my larger tanks, two are easier to tweak the flow without having it on full blast and you double the amount or biological media.
 

aquascape1987

Member
Joined
6 Nov 2014
Messages
369
Location
Leeds, West Yorkshire
I always prefer two. I even run two on a 90 litre tank and think that the rated flow is approaching 20 x. I’ve had all round better plant growth and tank health since I upgraded to two filters 👍

But you need to make special consideration for making the tank habitable for your livestock and plants, with this much filter power. It’s no good if the flow washes everything away
 
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