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I think it is time I give a preliminary conclusion to this comparison. I have since by-passed the hydroponics and both the above-ground submerged filters. The results were in a way within my expectations.
Below are my views:
1. BS/BH works. Nothing new I suppose. Despite my heavy feeding and my by-passing of my filters the BS/BH took over the task wonderfully. On the other hand I note that the BS/BH did not benefit in any significant way in addition to my huge conventional filtration system. Or should I say that the BS/BH is redundant to my pond?
2. BS/BH did not have any significant effect on my kois (in terms of appetite, growth and skin quality). To give due recognition to the BS/BH all these were maintained when the above-mentioned filters were by-passed.
3. BS/BH has no effect on the sludge accumulation in my filters. I see the same amount of sludge which require daily siphoning. This was a big time disappointment to me. I expected the BS/BH to ease my work. Sigh.
I believe that the BS/BH will do the job just as well if I by-pass my last submerged filter. I will do that after the Chinese New Year and if there is nothing significant to report I will not post any further regarding the experiment. Meanwhile you guys can draw your own conclusions.
Good luck.
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