Yes, be very afraid of in tank treatments. Ivermectin is no joke.I’d love to as well I’m afraid of in tank treatments at this point, so I may let it ride as is
200+ day half life. It can be treated as a dip but must be rinsed in tank water before returned to tank. Better to do 2 rinses as some medicine will be in the rock and transfer to the system anyway.
I did a whole tank/rock dip when swapping tanks and I'm pretty sure the lingering meds killed my 5+ yo clam months later. This was with rinsing.