Steve Lansing wrote:Aquaponics with Tilapia seems straight forward. One question I am not sure about is the transition from full grown/harvest of the tilapia and the replacing of the mass of fish for the plants to get nutrients. What I mean is this, say you have 100 fish, adult, ready for harvest. If you take them all out and add fry, the mass of fish is way down and the plants get less nutrients. My question is, can you add fry to adult tanks and do a gradual swap till the fry get larger and you finally take out the last of the adults? For example, since the fry grow so fast, if you take out 20% of the adult fish and add l00 fry, then over the next 6 weeks or so, you take out more and more adult till they are gone. Now the fry are larger and producing enough nutrients for the plants? Bottom line, fry and adults in one tank or have a second grow up tank? Thanks Sylvia.
Rach Hasbu wrote:First off, welcome Sylvia
My question is:
In you short video, you mentioned that ratio is important, is that ratio of fish to water, or fish to plants or a ratio of all three?
Also what is the smallest system that you think is viable? What sort of space do I need available to start? My garden has very limited space.
Bryant RedHawk wrote:Welcome Sylvia, it is great to have one with your expertise here. I have been trying to convince my wife that we should start one of these systems. I have unfortunately been unsuccessful to date and any help with answers to her questions would be greatly appreciated.
Can we grow fish such as Crappie or bluegill in one of these systems?
If we can how much space would be required for each fish?
How large a tray system can be taken care of per fish tank?
What is the average cost for a basic system?
Since I am definitely not fully familiar with aquaponics, and my wife tends to want to know as much as possible before starting something neither of us have experience with, it would be wonderful if you can help us out.
I an sure she would listen to someone with your experience and perhaps I would then be able to start gathering the items needed to set up a small, starting out system.
Thank you for giving of your time and knowledge, I know everyone here appreciates it as much as I do.
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177 hours of video: the 2017 Permaculture Design Course and Appropriate Technology Coursehttps://permies.com/wiki/65386/hours-video-Permaculture-Design-Technology