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How to clean rafts and control algae in a raft-based growing system

July 28, 2025 | Events, Phoenix, Maricopa County, Arizona


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How to clean rafts and control algae in a raft-based growing system
Speaker 1, a speaker, outlined step-by-step cleaning and algae-control practices for a raft-based growing system used in the meeting discussion. "When you clean the rack, at some point, it may unfortunately, something may go wrong with the system. It it happens, and you may have to clean it out," Speaker 1 said, and described how to disassemble, rinse and sanitize components.

The guidance emphasized disassembly and rinsing: "you take the system apart. You can make it in your shower, preferably outside with the hose. Wash it out real good," Speaker 1 said, adding that operators should scrub with a soft-bristle brush to "get all the algae out, get all the junk out." Speaker 1 recommended rinsing hoses by running a hose through them and, if desired, soaking components in a light, diluted bleach solution and then thoroughly rinsing before returning parts to service.

Speaker 1 also advised regular surface wiping to limit algae buildup: wipe the edges of the floating rafts and the inside of tubs with a clean cloth and "no soaps or detergents, anything like that," and pick up rafts to wipe their insides. For surface algae on rafts, Speaker 1 said operators may use hydrogen peroxide or a diluted bleach solution to wipe the raft surface but warned, "just don't let the, hydrogen peroxide or the bleach touch the plants." The speaker compared algae to garden weeds and recommended ongoing, spot checks while plants are growing rather than always doing full cleanings: "It may not need to be the whole thing. No. We're just constantly checking it" and "as you're harvesting out of the system, the the rafts, they they get dirty over time."

Speaker 2 asked clarifying questions about where to clean and whether algae can reach the raft surface; Speaker 1 confirmed algae can appear on many surfaces in the system and reiterated cleaning locations and methods. The discussion included practical cautions: avoid cleaning with soaps or detergents, avoid letting sanitizing solutions contact plants, and favor mechanical cleaning (hose/rubbing/soft brush) supplemented by light chemical disinfection followed by thorough rinsing.

This discussion was instructional and did not include any formal motions or policy directives. The transcript did not specify cleaning frequency, exact dilution ratios for bleach or hydrogen peroxide, or disposal instructions for rinse water.

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Scribe from Workplace AI
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