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PostPosted: Jan 19th, '07, 12:59 
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you can look up prices for new pipe on places like tradelink's site

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PostPosted: Jan 19th, '07, 16:57 
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Seriously, this cant be healthy.
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One of the things I was thinking is that it is available at the local dump second hand shop, they have some there, but dont have a price on it.


Ask them the price then offer them half to get it off their hands - go to a plumbers or "B" and find out the new price in your area 1st :wink:

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PostPosted: Jan 19th, '07, 19:36 
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Macca this is not unlike my plans:
http://backyardaquaponics.com/forum/viewtopic.php?t=477
It's not up and running yet so I cant tell you if it actually works. My pipes are all in place but I'm waiting for my tank. I've left my pvc horizontal. There will only be about 1cm in the bottom of the pipes with a near continuous flow of water. My top pipe is 150mm which will be 3/4 filled with gravel to act as a solids filter, the other pipes are 90mm empty except for the drop in cups which are filled with perlite. As for prices, the 150mm pipe was $15.60/m, the 90mm was $3.28/m

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PostPosted: Jan 20th, '07, 03:04 
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PVC is very expensive. Here's the rub. A 3ish metre length of 145 mm as used by plumber on neighbours yesterday is $120 to general public. As a large consumer of said goods the plumber can get it for $35.

If you get that rack running correctly I'm going to call it Macquaponics!

The top tank - solids filter? I had some disastrous (well, bad) attempts at using pipes and have since discovered that solids were part of the problem, and gases the other part. It can get pretty warm in there while plants are small and I battled pythium a lot.

Solids removal can be a filter for the purpose, or a growbed. Degassing - a bubbler in your top tank and plenty of room for air exchange should do it as can be witnessed by F&F's beautiful nft.

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PostPosted: Jan 20th, '07, 05:47 
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I did a deal with the local plumbing supplier. I brought all of my pvc from them instead of getting some from B, and they gave me "trade prices", about half way inbetween the two prices that AA mentioned above. All up I paid out $300 which included 6m x 150mm, 12m x 90mm, 12m x 20mm pressure pipe, and fittings including barrel unions, ball valves etc. I've got room for about 60 plants. I think the price compares faviourably to the equivalent size growbed that you would need for 60 plants.

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PostPosted: Jan 20th, '07, 06:00 
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I got 150mm PVC from TLink and 6m was $50.90

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PostPosted: Jan 20th, '07, 06:17 
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Jaymie wrote:
I got 150mm PVC from TLink and 6m was $50.90
WOW!

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 Post subject: Re: Macca's system
PostPosted: Jan 20th, '07, 06:40 
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Im gonna hit the 2nd hand shops etc... see what i can find...

I was wondering how to generate the bacterial growth, and I like the idea of putting gravel in the top pipe and vermiculaite in the cups.

Getting Oxygen to the plants apparently is a large problem in this sort of system, so good airation is essential.

ALso, Im also thinking what sort of pump would be required, strength wise to get enough water pumping.

As I said, the type of system ill create for me is more centered around cost.


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PostPosted: Jan 20th, '07, 06:44 
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with your pump macca, think how many litres per hour you want. remember flow rates are generally quoted at zero head. Now double the litres you want, then double it again to the litres you need! You can always throttle the pump back if you need to, and it allows for further expansion

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 Post subject: Re: Macca's system
PostPosted: Jan 20th, '07, 09:58 
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Macca, I have found with the pipe full of gravel that flow rates change (sometimes on a daily basis)
As my system has water delivery to each plant via black retic pipe inside the PVC, they block on occasion delivering more water to other areas.
Have found that some days the high end of the pvc is full but the low end is just trickling.
I would imagine that the flow rates are also in comparison to the size of the root ball from the plants. As my tomato bush has growen the water slowly backs up.
All these little things eventually make a big one!
But for now I check the system every morning and evening (as work allows) and adjust accordingly.
I also found that when I had the gravel pipe flowing into the water only pipe and flowing back to the tank the water pipe didn't do so well, mabey the water wasn't flowing fast enough?
Anyway good luck and enjoy what you are doing :D

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 Post subject: Re: Macca's system
PostPosted: Aug 4th, '07, 21:10 
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Just wanted to post some dream designs.

You know how sometimes we feel we just gotta design for the fun of it...?

This design could be modified to start up, say 1 * 1000 Ltr tank with 4 growbeds... cheaper and a smaller foot print. But later another tank, pumps etc would be needed, and thats extra cost.

At least another tank would alows for other species to be grown hehe


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roys AP dream.JPG
roys AP dream.JPG [ 36.23 KiB | Viewed 2540 times ]

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 Post subject: Re: Macca's system
PostPosted: Aug 4th, '07, 21:14 
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Smaller tank system


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 Post subject: Re: Macca's system
PostPosted: Aug 4th, '07, 21:16 
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My thinking behind this is pretty much the same at school. Simplest design with less amount of work and parts. Straight flood and drain beack into the main tanks. 1 pump required for each tank and perhaps 1 Aerator...

One day...

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PostPosted: Aug 4th, '07, 21:20 
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One day...

a month or so after getting to cairns :?: ;)

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 Post subject: Re: Macca's system
PostPosted: Aug 4th, '07, 21:20 
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Again, smaller... Ok its late and im playing now....


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