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Aquaponics Adventures

A group for those who are either doing, or thinking about, aquaponics.  All tips welcome.  Nobody is too experienced or too new to join.  

Members: 47
Latest Activity: Jul 6

Discussion Forum

Description of a simple Aquaponics Mineralisation Tank

Started by Rob Collings May 15. 0 Replies

Below is a one sentence description of the Mineralisation Tank (MT) which I use to mineralise aquaponics solids waste, which is collected via filtration within the aquaponics loop. A 200 Litre plastic blue barrel containing watery solids’ fish waste…Continue

Tags: ammionia, solids, waste, suspended, nitrite

The crux of the matter - what do the fish taste like?

Started by Andrew Cumberland. Last reply by Chris Nov 18, 2015. 7 Replies

When I started this aquaponics gig, there was one thing that was playing on my mind.What do the fish taste like?  Are they any good?Some people thought they'd be bland.  Others suggested a muddy taste.  I can report neither is true.  I found them to…Continue

Tags: aquaponics, taste of jade perch

Replacing Your Fish Harvest

Started by Andrew Cumberland. Last reply by Rob Collings Nov 5, 2015. 7 Replies

The Lads (that's as close to a name that they'll ever get) are now mostly at harvest size.  This brings some challenges that I'm starting to think about.Spacing the harvestI want to eat them fresh, not frozen.  Some are quite large and some are…Continue

Tags: backyard, new fish with old, aquaponics

Coping with the seasons

Started by Andrew Cumberland. Last reply by Andrew Cumberland Dec 28, 2014. 12 Replies

Hopefully, we can share some tips.  Keeping the tank warm in winter and cool in summer. Continue

Tags: seasonal tips, cooling, heating, Backyard, Aquaponics

How tough is this aquaponics gig - be honest now!

Started by Andrew Cumberland. Last reply by Andrew Cumberland Nov 20, 2014. 28 Replies

I'm hoping people who have a set up or two join in to this conversation.  It's aimed at helping those thinking about aquaponics. So how hard is it?  Do you have to be a chemist?  Genius?  Farmer? Fish keeper? Share your experience. Continue

Tags: how hard, aquaponics, backyard aquaponics

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Comment by Dave Riley on July 6, 2016 at 21:22

After pursuing more info, I think bathtub yabbies are do-able.

I'm fixing to start with an opera house net and fishing a friend's dam...around here, they are all actually lagoons. 

Grow on from there. If no local crustacean fauna is on offer, I'll get my initial supply from pet shops.

As per usual, water quality and oxygenation are the major management protocols, but I'm thinking I'll begin in very hands-on mode without a pump. 

I'll water my seedlings with the water I draw from the tub and replace it as per aquaculture norms.

If one tub works, I'll get another...and if that proves practical, I'll get a further tub....

Cheap.

Feed 'em kitchen refuse. The advantage there is that I now give the chooks the kitchen stuff, but I really don't want to up my poultry numbers as we don't eat many eggs.

The other critter I'm interested in is the fresh water mussel.

Edible. Maybe a bit tough. But a water cleanser.

Comment by Andrew Cumberland on June 29, 2016 at 19:40

LOL - I used to keep them indoors in a tank with a lid.  The lid had one corner cut away to allow electrical cords etc in.  The buggers used to climb up the cord and escape.  I'd find them all over the house. 

Comment by Dave Riley on June 29, 2016 at 17:59

Chicken wire, Elaine? Yabbies are escapologists... They are the bantams of the underwater world.

Comment by Elaine de Saxe on June 29, 2016 at 16:11

Fascinating stuff! But what use is the chicken wire? 

Comment by Andrew Cumberland on June 29, 2016 at 15:08

The pipes and pots should be a range of sizes.  You want small ones for young to hide in where the big ones can't access but you also need bigger ones for when the larger crays moult.

Ah... you are going to grow directly in the tank?  I'd probably try to use a floating raft of old styrofoam and then chicken wire between rafts.  Remember, the bigger the gaps then potentially the more yabbies you could lose. 

You will still need to aerate and clean the water.  I do it by using a fish filter (a normal old style aquarium one would work well).

Comment by Dave Riley on June 29, 2016 at 8:14

Two yabbyculture QUESTIONS: 

  1. What diameter do the pipes or pots need to be -- and how deep -- to protect the yabbies from themselves?The narrower the pipe the more I can fit into one space. You use netting, I see, for the fingerlings.
  2. I assume I can use 50mm hole (large hole) chicken wire so that I can grow  plant stem through the holes, right? 

Comment by Andrew Cumberland on June 25, 2016 at 20:50

I've kept both redclaw and western blues.  Both are hellishly aggressive when they shed - they secrete a hormone that drives the others crazy and they fall on the new soft shells.  The secret is lots and lots over cover like pipes, pots, rocks etc.  And yeah, chicken wire every opening. 

Comment by Rob Collings on June 24, 2016 at 23:18

A bathtub yabbie tank sounds like a great idea Dave. If you wish to use redclaw crayfish for growing out from a smaller caught size, you can catch them at lake Samsonvale & Summerset.

I've kept them in a pond before, and used pvc pipe to provide as much individual housing. It is best to chicken wire any way out, preventing the vertical escape paths as well, even if it seems impossible. They were very aggressive with each other.

They love earthworms and veg, can climb vertical and upside down when out of the water, survive out of water for days, will leave on mass if an eel enters the same body of water. 

I never got numbers from breeding, but by catching a female with live young underneath and raising many from that point. I had many losses from them fighting amongst themselves as the redclaw grew.

I've seen them breed well in a very long and narrow floating raft Aquaponics growbed (I think about .5 x 4 metres). They trimmed the roots of the many of the plants above (which still looked healthy).

The biggest drawback I found is the need to keep them in low numbers, but the end result being luxury food makes it worth while to have a go.

Comment by Dave Riley on June 24, 2016 at 22:33

Idea enters head. Seems feasible....

Does anyone have any experience of yabbies in a backyard pond?

I've just renovated my garden pond system -- I have 3 at the moment -- with growing more edible water plants in mind.

Looking at the bathtub I hope to convert to a pond, I thought, 'why not raise yabbies?'

Tick a lot of boxes does yabbies. 

Aquaponics per se is not my style. The pump for instance. But a yabby is a survivor of drought shallows and murky deaths so long as you keep up the oxygen in hot weather, the  water temp below 23 and the pH within a certain but wide range.

Of the ilk -- freshwater crayfish  -- there are around 100 species in Australia. OVERVIEW HERE.

Each animal requires about 30-40 cm area with places to hide from the other crayfish. The most commonly farmed on the east Coast is, of course, the yabby. 

Grew up around yabbies on my uncles' farms and yabbying in the dams was a family tradition. 

Good overview HERE.

One drawback is that they can be escapologists...ok except two of my ponds are made from plastic sheeting and they'd surely rip my engineering. 

Comment by Andrew Cumberland on May 18, 2016 at 20:33

If it's helpful, Rob and I could organise to come look.  We have quite different approaches to aquaponics, so maybe one of us might say something vaguely useful (although, knowing us, I doubt it - LOL!).

 

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