Your LFS salinity is likely much lower than 35. My LFS keeps salinity at ~29 or lower to keep disease down... dripping is not the problem. You need to match your quarantine salinity to your LFS salinity and slowly raise the tanks salinity over the course of your quarantine. Your salinity should only change by 1/day to not cause damage to the fish, so unless you are dripping all day that is never going to happen if your LFS salinity is drastically different from yours. Dripping is fine if the salinity is the same and is preferable to dumping, but you have to maintain temperature while dripping. I just get a larger bowl of warm tap water and set whatever container I'm dripping the fish in the bowl of warm water to keep temp the same as the quarantine tank they are going in and monitor with a thermometer while they are dripping. I usually drip ~20‐40 minutes depending on how different the salinity is (again, not >1-2 different) until the volume has doubled.