Not quite sure what it did, if anything. You throw it in your tank, it hisses like crazy and your fish are downright scared, at least for a few moments. After that, I didn't notice any decrease in ammonia levels at all. I followed the instructions exactly. I ordered a pack of NitroZorb to fit my aquarium filter from Revain which arrived the next day and worked very well and did what I was hoping these tablets were advertised to do but didn't.
EcoBio-Block Stone: Natural Water Clarifier & Odor Remover for Aquariums (Medium) - Treats 15-40 Gallons Efficiently
10 Review
ACCU-CLEAR Water Clarifier for Freshwater Aquariums - Quickly Clears Cloudy Water, Ideal for Weekly Use
9 Review
π Two Little Fishies Marine Snow ATLMSPD4, 16.9 oz
10 Review
Live Freshwater Aquarium Plants: Dwarf Baby Tears, Hemianthus Callitrichoides, Java Moss In Vitro TC Cup By Greenpro
31 Review
Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review
π U-BCOO Aquarium Gravel Cleaner Fish Tank: Manual Siphon for Efficient Filter Gravel Cleaning and Water Change in Tanks
22 Review
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review
π§² Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
34 Review