It takes about 4 or 5 weeks to work but when they're done your skimmer will throw up some nasty stuff. Also make sure to keep the Alcohol level a bit lower while dosing the charcoal or you will lighten the LPS/SPS. I should keep mine at 7.5-8 where I used to be closer to 10-11 dx.
EcoBio-Block Stone: Natural Water Clarifier & Odor Remover for Aquariums (Medium) - Treats 15-40 Gallons Efficiently
10 Review
Tetra AquaSafe tap water treatment agent, 5 l
11 Review
Live Freshwater Aquarium Plants: Dwarf Baby Tears, Hemianthus Callitrichoides, Java Moss In Vitro TC Cup By Greenpro
31 Review
Omega-3 caps, 1000 mg, 100 pcs, 1 pack, neutral
34 Review
Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review
Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review
๐ 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