Cor20 pump

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d.nguyener92

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Is it normal for inner pump to be dirty where the impeller goes? What’s the point of there being a o ring ?
IMG_1151.jpeg
 
Aquarium Specialty - dry goods & marine livestock
Yep. Don't worry about it. I ran mine for 2 years without cleaning. I lost about 30gpg.
 
Yes. This is normal. The oring is for if you use the pump externally.
 
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