TerraForums Venus Flytrap, Nepenthes, Drosera and more talk
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Iirc, blasting sand is even less expensive and it comes in different grit sizes. In our area, it's close to pure and doesn't add to TDS. Forbes had told me in the past that the stuff around Los Angeles was nasty & couldn't be used. Due to weight, much of this stuff is typically sourced locally.
A few tests:
- visual (it shouldn't look like grains of lime)
- put some in a small cup of vinegar & watch for bubbles
- place some in some pure water & monitor TDS (after rinsing)
I actually have a 50 lb bag of that in the garage. Since it was a "broken bag" (got ripped on a pallet), it cost only 62 cents. Now that's a deal! ALL MEDIA SHOULD BE RINSED WELL!
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