stillthinking wrote:Hi team,
If using scoria as a column packing how clean does it need to be/how clean can you get it?? Using a 4 inch copper column section 650mm long packed with scoria and a 450mm section above that packed with SS scrubbies.
Scoria has been flushed with the tap over a seive three times and allowed to dry, then boiled on the stove for an hour or so in a pot then did a vinegar run and a sac run with some feints. After the sac run the scoria was clean but the scrubbies held pink dirt when they came out and got cleaned in a bucked with fresh water.
Run was crystal clear, pulled 94% temp corrected too!
Is this ok/normal and to be expected??
Hi Stillthinking, I have been using scoria 10mm in a 4" bubbler in a 500mm packed section for over 2 years and pulling 94%. I got the 20mm scoria from the bit green shed and hit it so it broke in half. I have since got some 10mm from a garden supply, but whilst its not broke I will not try to fix it. I was a bugger to clean. I just kept soaking it until the water was clean. I run it with a 1kg of packed section at the bottom than filled with scoria and a 500g packed section at the top. The 1kg and 500g are copper. I just boil it now and again to clean it. Very happy with my results. TFFV comes out a treat. Don't remember the pink dirt, but perhaps I did not see it in the copper. :-D