Seamed to work without stressing the fish. As Dr. Johnson (Fish Vet) mentions online Microbe-Lift BSDT is done killing the parasites and has evaporated within 2 hours of treatment so bypassing the filter for just 2 hours immediately recovers the system without any hiccups until the next day's treatment. I only treated for 3 days as the directions say but Dr. Johnson suggested 3-5 days since the ick cycle is longer than 3 days and the stuff won't kill ick until it's in the swimming stage. My koi didn't have ick at least I don't think so. We'll see then seem to be much better and stop flashing. Also, my Bristle Nose Plecos in the pond did fine with the treatment as well.
158 GPH Submersible Pump Powerhead Aquarium Fish Tank Undergravel Filter
Oct 19, 2017
Great for clean up
Works Great to clean Aquarium! intake attachment is the PERFET FIT for a plastic water bottle neck opening, cut bottom off of water bottle-add face cotton disc and poly filter media in bottle, stick in tank and Filter away and polish. works great for clearing cloudy or dirty water quickly... DIY fast tank cleaner.