I heard about them from a YouTube channel (Mark's Shrimp Tanks) and they are vital to the health of your shrimp. They release much needed minerals into the water and I even catch my larger Amanos nibbling on them. They also make the water really clear.
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
π Two Little Fishies Marine Snow ATLMSPD4, 16.9 oz
10 Review
ACCU-CLEAR Water Clarifier for Freshwater Aquariums - Quickly Clears Cloudy Water, Ideal for Weekly Use
9 Review
Penn Plax QN2 Quick Fish
9 Review
π Enomol Gravel Vacuum - Aquarium Water Changer and Fish Tank Cleaning Tool Kit, Universal Siphon Pump for Quick Aquarium Water Changing
5 Review
Aqueon Siphon Vacuum Gravel Cleaner Mini: Compact 5-Inch Cleaning Solution
9 Review
FISH PROS Fine Mesh Handle
3 Review