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 Forum: Hardware   Topic: Expanded Clay media and stuff

Posted: Dec 14th, '20, 01:07 

Replies: 42
Views: 54417


... the ground or small stones. Terracotta clay might normally be fired to 1000c or a little more in my case, but this ie easy enough to reach ... burnt out, and have also made a test batch of home made goat dung scoria fired in my lounge room heater.. My first sentence wasn't very clear. ...

 Forum: New Member Introductions   Topic: Hello all from Riverside, Ca. First system (almost).

Posted: Aug 23rd, '17, 08:31 

Replies: 4
Views: 3044


Scoria works and is lighter than gravel but you'll have lots of fines initially. Cost will vary depending on where you can source it. Gravel works but it takes more effort because of the weight. I use a combination of red scoria and hydroton.

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Jul 25th, '17, 07:54 

Replies: 197
Views: 256954


Hi Pete, I must of got a batch of the same stuff, though doubt it, I got mine in Qld, when I first set up my system my PH went as high as 8.2 and then settled to around 6.8 to 7.00 after a couple of months, I recently added two more GBs last weekend and the Ph has come back up to 7.6.

 Forum: New Member Introductions   Topic: new member from oregon

 Post subject: new member from oregon
Posted: Feb 28th, '17, 05:19 

Replies: 4
Views: 2581


... tanks. i am thinking 6-8 grow beds 55gal cut in half Grow media will be red scoria and river rock Fish, thinking of catfish maybe trout but family not as fond of trout. ...

 Forum: Members Systems   Topic: Brads 1st IBC Aquaponic system

Posted: Feb 22nd, '17, 11:41 

Replies: 17
Views: 8768


... 3 cut down sides from IBC's, each bed will have about 900 litres of red Scoria as the grow media and 2 300l sumps under the grow bed's. The fish tanks is yet to come ...

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Feb 15th, '17, 12:32 

Replies: 197
Views: 256954


+1 Pete,
To make matters worse, I added lots of shell grit when I first set up the FTs and had to vacuum it all out. The GBs are now settling down nicely (after 8 months), but pH is still 8-8.2.

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Feb 15th, '17, 04:15 

Replies: 197
Views: 256954


In my case the scoria pushed the Ph up to over 8.2 but is slowly coming down. Hasn't been a big problem but most prefer lower Ph's.

Pete.

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Feb 13th, '17, 17:59 

Replies: 197
Views: 256954


I'd assume the dyed stuff would be quite uniform in colour, but the natural rock has a lot of variation in colour between individual pebbles.

 Forum: Members Systems   Topic: Passive solar greenhouse / aquaponics system planning/build

Posted: Feb 6th, '17, 20:09 

Replies: 786
Views: 316798


... thinking will be pea stone, then maybe GB1 and GB5 see if I can find scoria and hydroton to try in the smaller beds since I think they will be ... coconut coir $23.76 / 1.5 cu ft potting soil $13.47 / 1.67 cu ft red lava rock $3.52 / 0.5 cu ft pea stone $19 / 0.5 yard (about 13.5 cu ft) ...

 Forum: General System Discussions   Topic: What grow media does everyone use?

Posted: Jan 31st, '17, 21:14 

Replies: 19
Views: 5955


... go that route make sure your growbed has very sturdy supports! I've got red scoria in the bottom 20cm of my beds and expanded clay in the top 10cm; scoria's heavier than ...

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Nov 8th, '16, 18:28 

Replies: 197
Views: 256954


not sure exactly how you might test it, but the tend to dye / coat the decorative stuff.

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Nov 8th, '16, 17:03 

Replies: 197
Views: 256954


Is there a way to tell the difference? Is it just the size that's different? I didn't buy it, it was put in by the previous owners over 10 years ago.

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Nov 8th, '16, 14:37 

Replies: 197
Views: 256954


Drainage scoria is what is wanted, not decorative. however both can look reddish, so if you didnt buy it then its hard to know what it is. scoria can be pretty porous, so a rinse probably wouldnt be enough as a good wash, if you ...

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Nov 8th, '16, 12:14 

Replies: 197
Views: 256954


Quote:
Obviously well washed.. Any thoughts?


as noted in other threads around here some of it in the landscape market is artificially coloured.
raw scoria is fine.

+1 to the herbicides and weed killer residue. If you spray for termites or ants there may be pesticide residue.

 Forum: General System Discussions   Topic: Is red scoria safe as a growbed media

Posted: Nov 8th, '16, 11:27 

Replies: 197
Views: 256954


pesticides to kill weeds I think you mean herbicides :headbang: Sorry but I have to dump this one back on you. I don't think anyone here that can tell you the answer to that question. You could have it tested by a lab and you could try growing some different plants in it as a test, you could also a...
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