I'm not sure "having some unknown stuff show up in the tank and start growing" is a criteria that renders someone instantly incapable of evaluating information about that stuff. Wanting to be certain that disturbing a tank so much is the only good solution is, IMO, a good sign for someone's ability to consider information they're being given.owners of invaded tanks aren’t equipped to evaluate cure methods, to choose among them, or they wouldn’t be in the position of being under extended invasion in the first place.