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Discussion Starter · #1 ·
Is there a rule of thumb for how big a filter to have?

I have a 180 litre tank with a eheim 2234 (up to 200 litre) cannister filter and the fitted (Juwel) internal filter it came with so i'm guessing i had more than enough filterage, and i've always had crystal clear water.

However i now have taken out the internal filter (as it fell off the glass - the silicone gave up the ghost)

So i'm left with a 200 litre cannister for my 180 litre tank.

Is this enough??? as my local garden centre says i should upgrade to a filter that will handle 400 litres?

I have 1 fish a Jaguar cichlid (11") which due to it's fussy nature eats 3 times a week so there isnt a lot of mess but also on monday i will be swapping the jag for a breeding pair of Green terrors (7 & 5 inches approx)

I dont mind forking out the money for a second cannister but i'd rather not if i dont have to..

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