h202 stays active in the water for aprox. 24 hours depending on the level of bacteria in the water. h202 will also reverse the effect of hydroguard never use them together hydro guard is a from of bacteria itself wich makes it compatibale with organic or chemical nutes or benifical bacteria.
u.g.u Reviewed by u.g.u on . ATTENTION GH's "FloraShield" users..... If you use Florashield by GH as prescribed in their charts like their "phase feeding cart" or "weekly feeding chart", it says to use 37.5 ml. per U.S. gallon of reservoir at every reservoir change. What they don't tell ya' is what the stuff does exactly, and what exactly it contains. THey don't tell ya' that 37.5 ml./gal is NOT for every gallon of every resevoir change, and that it is only intended for specific needs like a root rot problem, or bacterial infection. They make it look Rating: 5