1) Remove filter carbon and turn off UV sterilizer (if used). 2) Add one tablet per day to each 5 gallons (19L) of aquarium water. Treat for 5 consecutive days, at 24-hour intervals. 3) For best results, after 5-day treatment, wait another 24 hours (day 6) before returning activated carbon, and turning on UV sterilizer. Also, day 6 make a 25% water change using a tap water conditioner/dechlorinator (such as Tetra AquaSafe).
Tetra Lifeguard All-In-One Freshwater Aquarium Treatment, Pack of 32 tablets
Size: 0.67 oz.
Gallons Treated: Treats up to 32 gallons
Pack Size: Pack of 32 tablets
Active ingredient: 1-chloro-2,2,5,5-tetramethyl-4-imidazolidinone.
Tetra Lifeguard All-In-One Freshwater Aquarium Treatment, Pack of 12 tablets
Size: 0.25 oz.
Gallons Treated: Treats up to 12 gallons
Pack Size: Pack of 12 tablets
Active ingredient: 1-chloro-2,2,5,5-tetramethyl-4-imidazolidinone.