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With no expertise whatsoever I'm guessing that established gravel beds develop a biotic community something like soil, and that's how TCLynx can run low fish or fishless for considerable periods. The interesting question is whether this is self-sustaining or runs out eventually.
I like the idea of a site with info for all, but where it's easy to see whether a page, thread or post is at the intro, intermediate, or advanced level (like the trail markers at ski slopes.)
Kate Mink said:I like the idea of a site with info for all, but where it's easy to see whether a page, thread or post is at the intro, intermediate, or advanced level (like the trail markers at ski slopes.)
Oh, I like that idea Kate
I'll try to get a Simple Rules of Thumb for Media Based Home systems up on the home page by the end of the week, along with some verbiage at the beginning about that this is for beginners, and encouraging the reader to delve into the rest of the discussions to learn the whys behind the rules, the variations to the rules, and the deeper ideas that are contained therein. I'll also send them to Friendly's website for their system, Travis's website for Barrellponics, and the UVI website for their info. I'll leave the comments section up for a week or so so members can comment. Sound like a reasonable plan?
I like this one already. It is 100% media-based though, so I will have to tinker with it, but at least it is based on the filter configuration, fish stocking rates and feeding data (volume AND food protein content). The output is also very good in my view as it gives you the other critical stuff such as flow rate and surface area of the filter. With the surface area I can mess with raft stats to get an idea of the overall characteristics of my system in terms of root surface area, which is a much more intuitive approach as compared to a rigid tank to gravel bed ratio that does not consider all the other critical variables. This feels a lot more like the thought process I went through originally designing it.
RupertofOZ said:I'm sure both Joel and Murray will no doubt comment shortly...
But Dr Wilson Lennard has just released an "backyard aquaponics system sizing tool"....
You can download both the modeling spread sheet, as well as the "how to" explanatory notes, right now.
The metric calculator (excel) :
http://www.backyardaquaponics.com/Travis/Aquaponic%20media%20bed%20...
The imperial Calculator (U.S.) (excel) :
http://www.backyardaquaponics.com/Travis/Aquaponic%20media%20bed%20...
The How to notes (pdf):
http://www.backyardaquaponics.com/Travis/Aquaponic%20media%20bed%20...
You can visit Wilson Lennards website here http://www.aquaponic.com.au/backyard.htm
You'll also find the links on Murray's forum site as well.....
So what are you waiting for, download the modeling calculator and see how your systems stacks up to the scientific recommendations.
Sylvia Bernstein said:I'll try to get a Simple Rules of Thumb for Media Based Home systems up on the home page by the end of the week, along with some verbiage at the beginning about that this is for beginners, and encouraging the reader to delve into the rest of the discussions to learn the whys behind the rules, the variations to the rules, and the deeper ideas that are contained therein. I'll also send them to Friendly's website for their system, Travis's website for Barrellponics, and the UVI website for their info. I'll leave the comments section up for a week or so so members can comment. Sound like a reasonable plan?
O dear - I see two design philosophies developing. Those that treat AP as having to adhere to the first steps of aquaculture philosophy before it hit the plants, and those that get headaches from that way of arguing! I look at that spreadsheet and it all clicks into place for me.......
As I said earlier, it seems to work according to how I have always pictured these set-ups of mine as having to work. Everyone to his own understanding then! Luckily there are so many ways to build these things!
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