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#2
05-28-2009, 01:13 AM
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I suspected this, thanks Jack.
I might have to undo my modification and test it with some salt water (at a reasonable salinity) just to see how small the bubbles are... I've already got it putting out pretty fine bubbles in freshwater with some time and a couple feet of 4 lb fishing line... My modified impeller... I suppose this would be called a 'web wheel'...   ...works pretty well for making fine (er) bubbles in freshwater. I'll mix some saltwater and see what happens. I have some confidence in this pump's ability as a component of a recirculating skimmer now that I've fiddled with it some.
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Calvin --- Planning a 29 gallon mixed reef... Last edited by BlueAbyss; 05-28-2009 at 01:23 AM. 
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#3
05-28-2009, 04:56 AM
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I've tested this in salt water mixed to ~1.021 SG @ 20 degrees C on my refractometer. I actually used Half Salt, which I ran out of (why I didn't run my test at 1.026 like I plan to run my system).
I can confidently say that with it will produce a very fine bubble. At least, it will with the above modification, but I'm sure it will do well out of the box also. I would say that this would be an excellent option for a DIY recirculating skimmer or retrofitting an older skimmer for cheap. We'll see how well it works in practice later on this summer.
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Calvin --- Planning a 29 gallon mixed reef...
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