Algae Clogging Soaker Hoses in Pond-Fed Drip System

Pond water in soaker/drip lines guarantees algae growth—organisms + light + nutrients = biofilm. Two practical mitigations exist.

Filtration

Install a 200-mesh (74 micron) screen filter after the pump, before the valve manifold. Clean weekly during season. Stainless steel screen, flushable cap. Brands: Rain Bird, Amiad, Netafim.

Chemical Treatment

Inject chlorine (bleach) at 1–2 ppm continuously via small venturi injector or peristaltic pump. At this level, safe for plants, controls algae/bacteria. Test with pool strips.

What Doesn't Work Well

• Poking holes: destroys emitter uniformity, temporary
• Flushing: algae regrows in days
• Copper sulfate: phytotoxic risk, not for food crops

Best Practice

Filter + low-dose chlorine. If pond is the only source, accept maintenance. For new installs, consider a settling tank + sand filter before the screen filter.