So i have this really bad planaria and nematode (ditritus worm) infestation in my stingray tank.. and i would like to get them out... so ive done water changes to halting foods. and its not working effectively... so ive decided to go to chemical nuking. I researched and many people use fenbendazole to control this issue, except fenbendazole is no longer sold due to the toxicity it has for the animals for it's intended use... does anyone have any suggestions of chemicals that will be safe for my fish? im thinking of just purchasing safeguard 8 in 1 dewormer from petco... And trying that. does anyone have any experience in this?