I actually used a bottle of KZ fw stop initially and while I'm not sure it killed them, I do think it kept them well in check. Only after I stopped using it did I start to see a jump in the population which led to the use of the Purge.sorry to hear, KZ flatworm stop, if you double the dosage that's the best in tank cure atm. since the product, don't try to kill theAEFW but instead boost up the slime production of the acro, which in turn cause the AEFW don't want to eat them. you can check out the thread in RC sps forum.
I have read other accounts of folks using double dose of KZ fw Stop with pretty good success, but have read it takes months (?) of use and let's be honest, that stuff isn't cheap...
