I know! I did not know about the val problem until after I started using it. I followed the directions on the bottle. Said to do 40% water change when do the large dose the first time, then 1 cap full every day for every 50 gallons. I'm curious to see what happens with the valls though.
46 Bow Front Planted
Eheim 2217 & 2236, 2-39wt T5 bulbs (10,000), 72-75*
Pristella tetras, cardinal tetra, amano shirmp, bamboo shrimp, nerite snails, assassin snails and red cherry shrimp.