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PostPosted: Dec 11th, '18, 16:16 
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I'm finally taking the plunge.

I've bought two black IBCs which I plan to connect at their drain taps. I'll drain the FT above each tank into the other tank so that they form one system rather than two. The setup will be chop and flip with bell siphons on each GB.

I bought eight 16kg bags of scoria for around $10 each from a local hardware store that begins with a "B" and I plan to pick up a 25m roll of13mm poly pipe and cut it into 150mm lengths to mix in. This should allow me to reduce the overall density of my grow beds to keep the weight down. I figure that I'll still have greater surface area than if I'd gone the more expensive route of the clay balls as the scoria looks to be 10-15mm. This way will only cost me $90.

Hopefully the break from work at Christmas will see me get my system set up and I can post some piccies.

Cheers
Nigel


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PostPosted: Dec 12th, '18, 22:00 
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sounds like a plan Nigel, good luck.

post the pics and questions as you go and sure the members will chip in with inspired thoughts..

not sure on the pipe. You run the risk it creates anaerobic (low oxygen) zones.
Scoria is generally lighter than most rock - just go with that.
some people have mixed clay and scoria.

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PostPosted: Dec 13th, '18, 05:47 
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dlf_perth wrote:
not sure on the pipe. You run the risk it creates anaerobic (low oxygen) zones.


Thanks for your response, Darren. Is your concern that one or both ends of the poly sections could be blocked by scoria, causing trapped water?


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PostPosted: Dec 13th, '18, 23:47 
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dead water = bad water in any system.
you need good DO throughout to maximise plant roots and worms etc.
The pipe offers no benefit.


I would just stay with the rock media.

p.s. make sure the scoria you brought is not coloured
(ie. natural)

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