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Another DIY Skimmer Thread Question

4374 Views 60 Replies 5 Participants Last post by  OneDummHikk
I've been looking though the threads, and am really turned on by this recirculating skimmer:

I've seen the basic design several times, so I am assuming that this works pretty well. I want to know if my feeding/pump would work, or should I use something different. The tank I have is not drilled, so I have a HOB overflow rated at 300gph that I would use to feed the skimmer. The pump that I already have is a Resun 225NW from my Octo HOB. I would meshmod the pump for finer bubbles, but has been a good pump so far. I'm planning on this being an external skimmer with the effluent draining into a sump so that all my overflow water gets skimmed. I currently have a 55, but will have to wait on my large upgrade to the 125 in favor of a 75 with the 55 as the sump. Will this work??? Will this work well??? More flow from my overflow, or bigger pump needed? It seems like I should be close according to info from here.
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Just another pump suggestion. Mag drives are available with needlewheels and venturis now. Haven't seen one in opertaion yet though.
Needlewheel found. Now the question is does the same volute fit both.
With a recirc skimmer the depth of water affects performance but IME it is not affected by small changes in water levels like a non-recirc skimmer can be. I run one of my G3's recirc'd and since I don't have my ATO running yet the sump water level varys slightly by an inch or two, maybe even 3" sometimes. A recirc skimmer is not as sensitve to the small variations in sump water levels and maintains the same internal water level regardless.

In a recirc skimmer, I would say that water level is a determining performance factor but it's just not as important in maintaining consistent performance like it is on other types of skimmers.
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