Moving Fluid Bed
#1
Posted 24 September 2016 - 12:25 PM
A few questions:
I have heard that a moving fluid bed of bio balls breaks the nitrates down quicker than a static chamber allowing less frequent water changes. Can someone confirm that is the case or is this exercise a waste of time.
Does the chamber needs to be square for the balls to tumble?
Are there too many balls in the chamber?
Is the answer more water or air flow? The chamber itself is about 80ltrs in volume.
Is it the incorrect media for a moving fluid bed? Will K1 work better?
Should I use a little internal filter to further promote the movement of media?
Any advice would be much appreciated
Thanks
Jamie
#2
Posted 24 September 2016 - 05:39 PM
Hi Jamie,
I feel that you may be a little confused on this subject. What I think you are asking about is a fluid (moving) bed filter. This works by suspending the filtration medium in an upflowing water stream. Traditionally the medium, or more accurately, bacterial substrate, consists of a suitable sand or similar medium. The use of bio balls would probably not be a good idea since their size and density does not make them an ideal medium.Add to this the fact that there is little benefit to having them suspended in an upflow when they are best suited to a wet, oxygenated, though not submerged downflow.
I can only suggest that you research the topic a little more...there is plenty of info available... before you decide this id the kind of filtration that you want or need. Fluid bed filters are extremely efficient biological filters, but exhibit little or no mechanical filter function.
Syd.
.
#3
Posted 24 September 2016 - 10:35 PM
#4
Posted 25 September 2016 - 01:08 PM
It's best to try and consider what your trying to achieve, then get the tools to make it happen.
#5
Posted 25 September 2016 - 08:32 PM
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#6
Posted 25 September 2016 - 09:06 PM
25mm pcv and elbows and tee,,, to form a manifold that's square or rectangular with a few center cross sections (using the tee's).
Roughly the third smallest size drill bit that can be found on the shelf, or a bit of testing, and drill holes spaced out in manifold.
Place manifold under bio balls.
Use a PondOne 4000 pond air pump to drive it.
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