External filter help

Tropical Tony

Fish Crazy
Joined
May 4, 2020
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Liverpool
Hi. I’ve recently just ourchased an Ocellaris 1400 external filter for my 150 litre tank. However the flow just doesn’t seem powerful enough. I’ve got quite a bit of excess hose on the outlet pipe. My question is how much will this reduce the flow rate. Think I’m going to cut it tomorrow but was just curious before I do it.
 

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