What the best way to slow the outflow of a in tank filter?

Hannah1064

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I have a in tank filter and the flow is not adjustable. At the moment I'm using the top of a plastic water bottle (cleaned with hot water, no soap) and have it tied around the filter. It keeps the flow from being so strong that it knocks my betta down when he swims under it. However, I'm worried that keeping that plastic in there could be bad for him. I had to replace it once before because something brown was on it (I know realllyyy gross). Is there a better way to fix this?
 

AquaCaitlin

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The plastic shouldn’t harm him, the brown stuff was probably just some form of algae. You can put a prefilter sponge over the intake, which might slow the outflow, but I’m not sure.
 
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Hannah1064

Hannah1064

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AquaCaitlin said:
The plastic shouldn’t harm him, the brown stuff was probably just some form of algae. You can put a prefilter sponge over the intake, which might slow the outflow, but I’m not sure.
Okay, I have a aquarium sponge (I'm not sure of the exact name) arriving in the mail soon I'll try that out. But thanks for the help!
 

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