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Man made pumice
Posted: October 6th, 2018, 11:27 pm
by Hackimoto
I'm curious as to whether anyone has done a ph test on artificial pumice?
Re: Man made pumice
Posted: October 7th, 2018, 9:24 am
by Hackimoto
The reason that I ask is that I did a ph test and it came up very alkaline 8.5 to 9. This could present problems.
Re: Man made pumice
Posted: October 20th, 2018, 1:09 pm
by dan.e
dunno but I have put this stuff in my mix this year so I would love to know also