btw for Mr Aqua OHF, i m not 100% sure if this sort of filtration type would work better with a slower flow rate, perhaps some bros could shed light on this?
if it were me personally, i would use a slower flow rate for Mr Aqua OHF Type of filtration and another thing is the media used, some type of media work better being submersed, while some work better in this sort of setting.
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