KD great advice. I have found that potomo has such poor root struture one treatmetn in say mid May when still growing will rid of all year. I need to take that advice on aquathol however for some of the sbumersed plants that have better root structure and does come back on us.
CJ I would say yes to grass carp if you want it eliminated totally. You seem with grass carp to get little or all solution not really a keep in "check' deal get my drift.
