|
Eugene: I believe Momotaro is doing 10% or so daily inflow of fresh water. I hope none of it is from a river. Bio-security concerns would negative use of surface waters inhabited by carp (or any fish IMO) without pre-treatment to drinking water standards or similar. I understand that Brett uses a surface reservoir as source water in his operations, but I have the impression that his bio-security procedures are very stringent. A constant in-flow of fresh water of proper condition is ideal. As DickB points out, however, what the Japanese sometimes call "raw water" may maintain fish health, but is considered negative for the best development. The term "mellow water" is a subject on which JR does an excellent job of waxing eloquently.
Koimann: Yep. Exactly. Lately there have been posts around about cleaning/maintenance of Bakki Showers and Bacteria House media. To be expected now that the Bakki has been around for a few years. The topic is perhaps of more interest in warm climates where the filters operate all year, than in climates where the units are shut down over winter and the media stored until Spring. The idea of thickening "membrane" is a bit confusing to me. I am guessing it refers not just to the biofilm, but also algae growth as suggested in an early passage in the article. I think of a thick biofilm as being a good thing. I do not believe it refers to clogging. Any way, I was already planning to clean off the BH in my Bakki one tray at a time (by just swishing it around in a trough of pond water to get off the debris & residues). This article has me a bit more committed to getting around to doing it.
|