I have some battery acid at my workshop, will pop in and get some this weekend and do a test Hennie. What sort of quantity should I use? Half a cup of sand and then fill up with acid?Any idea what type of sand it is ??
Can one of you guys put a small amount into a container and add some vinegar, or better still, some battery acid. leave it for a few hours (overnight...) and check if it makes small bubbles and/or dissolves. If it does, it's calcium based, and this will be a "great find" for us here in South Africa. If not, it would still be perfectly OK as long as it is smooth (rounded) and the grading is correct.
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