You are going to spend lot on Cutrine. Instead consider buying grass carp(GC) and tilapia. Both will eat Chara and GC will live several years long term to consume Chara. Although in my experience tilapia will eat Chara more readily compared to GC. Both species will complement each other. Tilapia denuded my Chara infested pond last year. Plus you can catch and eat the tasty Tilapia at the end of summer and Cutrine does not taste very good. You kill all the Chara and its biomass will very likely be replaced by big growths of filamentous algae or the dormant / latent 'spores' (oogonium) of Chara will resume growth. You now know how fast Chara can grow in your pond. Cutrine suppresses the Chara temporarily. Nature demands some sort of plant to always grow to utilize the AVAILABLE plant stimulating nutrients. Nature abhors a vacuum.

Last edited by Bill Cody; 02/10/22 11:10 AM. Reason: enhancements

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