Rock Cleaning & Sand/Silt Separation Strategy

# The Sand Problem (And Why It's Actually Interesting) Not all dirt is created equal — and this week the pond made that very clear. After getting the rocks out, I ran the remaining water and sediment through a door screen to sort what was left. That's when something clicked: the stuff settling at the bottom wasn't just "dirty water." It was two completely different materials — sand and silt — with completely different fates. **Sand** is actually valuable. It holds moisture, drains well, and is exactly what garden soil wants more of. But leave it sitting in the bottom of the pond and it compacts, blocks water circulation, and creates low-oxygen dead zones where good bacteria can't survive. **Silt** is the opposite — fine, almost powdery particles that cloud the water and need to go entirely. The plan: pump the pond water through geotextile fabric (the same material used in French drains) to catch the sand while letting the silt-laden water pass through. The sand gets saved for the garden beds. The silt water gets pumped out. Two problems solved in one pass. There's a bigger idea underneath all this. The bacteria that make aquaponics work — the ones that convert fish waste into plant food — need moving, oxygen-rich water to thrive. Building the pond right means building it for them, not just for the fish or the plants. Every design decision flows from that.