Thanks for the feedback. So, if there aren't any fish to dig it up I shouldn't have much of a problem with it floating up? I think I read somewhere that it can be difficult to keep it from becoming uprooted.
BTW, the tank will have MTS/Saf T Sorb substrate, pressurized co2, and EI dosing. Lighting will be a Catalina 3 bulb t5ho fixture. Does that seem capable of growing HC?