This is the fun part. Build a slow sand filter. It sounds complicated. It’s not. You need a bucket, some gravel, fine sand, and activated charcoal (the kind you buy for fish tanks).
Layer them like a lasagna: gravel on the bottom, sand in the middle, charcoal on top. Pour your collected rainwater through this. The charcoal absorbs odors and chemicals. The sand catches tiny particles.
You’ll watch brown, murky water turn clear in seconds. It feels like magic. But it’s just physics having a good day.
