Algae in Reservoirs

Anonymous added on July 17, 2015 | Answered

Why is there a lot of algae growing in my vegetable water reservoirs? And is it bad? I am growing my vegetables in containers and in a greenhouse.

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Certified GKH Gardening Expert
Answered on July 19, 2015

There are 3 things algae needs to survive, water, light and food. Make sure that fertilizer is not making its way into the reservoir, as this can make algae blooms worse. Also, if you can, block light from getting into the reservoir. Third, make the water less friendly with a few drops of bleach. Literally just a few, 1-2 drops per gallon of water and don't add it right before you plan on using the water in the reservoir. This will be diluted enough not to harm your plants but will reduce the algae and making sure to wait before using the water adds an extra layer of protection as the bleach will evaporate from the water, leaving even less in the water.

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