Want to blow your mind? Test melted snow. It’s often under 10 ppm. Test your tap water after a storm. It might spike to 400 ppm from runoff.
Test a brand new water filter. It reads low. Test it after six months. High numbers mean it’s full of junk. You just found out your filter is a liar.
I once tested rainwater. It was 8 ppm. Then I tested a puddle next to a road. It was 1,200 ppm. Birds are basically drinking road-sludge.
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They cost twelve bucks on the internet. It’s cheaper than a movie ticket. And it gives you hours of joy.
Test your aquarium. If it’s over 400 ppm, your fish are stressed. Test your plant water. Too much TDS? Your basil will get sad and droopy. You can be a plant hero!
Total Dissolved Solids: Understanding Water Quality Indicators – Water
Test your beverage. A can of soda is over 700 ppm. That’s basically liquid sugar with a side of salt. You’ll never drink it the same way again.
