Chin_Lee:Happy to hear it worked out for you....it's good stuff eh?
I haven't done a re-treatment on my tank yet, but so far no flatworms to be seen.
Myka: I believe the toxin release is almost immediate, when I dosed my tank I noticed a yellow colored liquid in the vicinity of dead/dying flatworms right away..it's almost like they disolve as soon as they die. (My personal observation and not scientific fact).
Francis