Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
What is the GH, KH, pH and TDS of the water you are starting with?
What are the optimum parameters for the livestock?
You should alter this water before it even gets to the tank so it is very close to what the livestock want. Then the substrate can stabilize it for a long time because there will be very little adjusting to do.
Also, there will not be sudden changes in these levels when you do a water change.