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Small-Scale Question Sunday for February 18, 2024

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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Is it a dammed stream, or does it just collect runoff? If it's the latter, it will be filthy no matter what you do. Geotextile + a truckload of pebbles is the usual approach.

It's spring fed, but also collects runoff.

If it's spring-fed, then covering the bottom with geotextile is a bad idea. I would go with pebbles/sand, plus a secondary gravel-filled ditch for filtering runoff