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If the stocking density is really really low on the fish, you may get away with growing the plants directly over the fish tanks. And I think most of his systems are actually growing shrimp or prawns which need lots of horizontal space per animal but not much depth so they live happily under rafts. Friendlies does prawns directly in their raft beds.
Keep in mind that having the fish live under the rafts will make it difficult to harvest fish without disturbing all the plants. I don't think this guy harvests his koi. The prawn harvest probably only happens once or twice a year though so that can be scheduled into the planting schedule.
With rafts over the surface of the animal rearing space, one needs to make sure there is plenty of dissolved oxygen getting into the pond by other means. Some way to monitor dissolved oxygen would probably be necessary on anything like a commercial scale.
I've never found in depth details about his systems in English, I've only seen videos. I expect there are parts of the systems not shown in the videos (bio-filtration, solids filtration etc.)
I was wondering the same about the oxygen and filtration..I can't find that info anywhere.. My main interest is in growing lots of produce, secondary interest is in the fish, not sure I will even be able to kill them after raising them for months, may feel like they are pets, but for now I am going with the tilapia. In one of his videos he shows a different type of fish other then Koi.
TCLynx said:If the stocking density is really really low on the fish, you may get away with growing the plants directly over the fish tanks. And I think most of his systems are actually growing shrimp or prawns which need lots of horizontal space per animal but not much depth so they live happily under rafts. Friendlies does prawns directly in their raft beds.
Keep in mind that having the fish live under the rafts will make it difficult to harvest fish without disturbing all the plants. I don't think this guy harvests his koi. The prawn harvest probably only happens once or twice a year though so that can be scheduled into the planting schedule.
With rafts over the surface of the animal rearing space, one needs to make sure there is plenty of dissolved oxygen getting into the pond by other means. Some way to monitor dissolved oxygen would probably be necessary on anything like a commercial scale.
I've never found in depth details about his systems in English, I've only seen videos. I expect there are parts of the systems not shown in the videos (bio-filtration, solids filtration etc.)
Aleece,thanks for the info.
Earl, The fish are inside the raft tank. I'm not sure what you are referring to about running thru bio filter from raft back to fish tanks.
Michelle Silva said:Aleece,thanks for the info.
From one of the other videos the small system it looks as if there is a tank off to the side in the back ground covered with wood. I was guessing that this is where the bio filter is and aeration is located, Just guessing
.Michelle Silva said:Earl, The fish are inside the raft tank. I'm not sure what you are referring to about running thru bio filter from raft back to fish tanks.
Michelle Silva said:Aleece,thanks for the info.
I find the API PH test to be very difficult to match to the color card, so I'm currently looking for a digital PH tester. I bought one that turned out to be a toy and has no accuracy at all. There are several others on e-bay for less than $35.00 and one that does 6 tests but costs over $100.00.
Can anyone relate their experience and advise me before I purchase another?
Hanna Instruments has a good range of instruments. from pocket field check to lab quality and some industrial.
Hanna also has a complete line of other water quality meters/instruments. And is available through Grainger. in the phonebook or this online catalog with local dristributors everywhere (Yes international too.
http://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=Hanna...
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