Jade perch happily eat duckweed and silver perch can be trained to eat it, too.

I don’t sell duckweed but I’d be very surprised if you had much trouble finding some……it’s often available through aquarium shops.

Are you discussing the native Duckweed plant
If not, does the native variety have the same qualities as other varieties, do you sell the native variety and which fish eat it.
My dam is full of Gudgeons ( a pest) but i am introducing native fish to eat them but am happy for the gudgeons ( guppys) to fatten up on the Duckweed

Drs Resh and Jensen were not reporting on their own systems but rather on those in commercial use in places like the US and Japan. In some cases, these arrangements covered commercial undertakings of many hectares.

What I have said is that the suggestion that grow tanks should/must be 300mm (for the reasons that they state) is nonsense. I’ve provided references to the work of researchers like Drs Resh and Johnson which demonstrates quite clearly that grow tanks of less than 300mm were frequently used……which suggests that they worked quite satisfactorily.

To further support my view that grow beds and tanks of less than 300mm work quite satisfactorily, they have been sold by hydroponic stores for many years. They have also been used effectively by Matt and Shannida Herbert at their farm near Mudgee for longer than most (if not all) other grow beds or tanks in Australia…….and my experience supports theirs. You can see video footage of the systems that feature these beds…..here.

I belong to a US-based aquaponics listserve which has members who have also been using sub-300 grow beds…..for years.

I’m sure that, if I wanted to spend more time, I could find many more examples.

Howzat?

I apologise for all of these silly qustions however like I said in my last post I want a really balanced picture of Aquaponics.

I don’t have a copy of Dr Resh’s book and and haven’t seen Dr Jensons reports. I am curious as to whether if Dr Resh and Jenson designed their beds specifically for the purpose of their hydro system or did they use what was already available for their research?

I have read your reply via the link that you have given and was hoping to see some quoted evidence to support your stance against the “fundamentalist claims. Any one can make claims but until evidence has been shown that clearly refutes their claims it will still have some weight of credibility. It will still feed doubt to the mind of unenlightened.

You said i should be asking where can they produce the evidence to support their claims and that is true they most certainly should and I can’t wait to see it if ever. Please don’t take offense but i haven’t really seen where you have provided evidence either. There are no quoted references from people of authority or are there none to quote from?

I think I am starting to ramble on a bit and I should get some shut eye before I say something really dumb.

Thanks for your help hope to learn more soon.

I am curious as to what the advantages are over 300mm beds and would like for you to show me where i could find them. Or could you tell me what they are.

Wouldn’t it make sense to use the beds (whether it be 150mm, 300mm, 600mm) that provide the most possible positive outcomes for you at the most cost effective price?

The reasons given by the “Fundamentalist” appear to be quite sound. Where can i find the info to refute there cases?

I would much appreciate your guidance in this as i would like to make sure that i have a balanced view of what Aquaponics is and what i really need to be made aware of before i commit any serious dollars to my self sufficient dreams.

The issue is not whether something is better (although the fundamentalists do claim that 300mm grow beds are better), but whether their justifications for the claim have any scientific merit…..and they do not.

I share your concern about the BS and I will continue to point out where it occurs. Notwithstanding the nonsense that comes from the fundamentalists, I will also continue to provide information that makes growing fish and plants less risky, less expensive and more efficient.