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Old 06-22-2015, 02:16 PM   #1
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Hob overflow

Can u underlow a hob overflow box?? I ask because i late night amazon'd an overflow for a 125g+... I'm only setting up a 75g with a sump? Will it be okay as long as my pump is good enuff?

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Old 06-22-2015, 03:32 PM   #2
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In my opinion, yes. I've had micro-bubbles build up and form an air bubble in my U-pipes before. If you have the flow fast enough this won't happen as the flow will carry the forming air bubbles right on through.
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Old 06-24-2015, 11:53 PM   #3
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Quote:
Originally Posted by Calqless View Post
Can u underlow a hob overflow box?? I ask because i late night amazon'd an overflow for a 125g+... I'm only setting up a 75g with a sump? Will it be okay as long as my pump is good enuff?

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Yeah as long as your pump's gph rate is lower than your hob maximum gph by not so much you should be fine.

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Old 06-25-2015, 03:09 AM   #4
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Freshwater or saltwater? In salt we like our water to move slowly pass the skimmer. In fresh it really doesn't matter unless you're looking for anaerobic areas...
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