Join Date: Feb 2012
Location: Ontario, Canada
There are many ways of doing it but I prefer the water is treated before they go into the tank. Adding any form of peat in the filter means as peat wears off your PH will go up, and when you add new your PH goes down. As observed, the range can be close to 2 degree so I myself try to avoid that. That said, active substrate or at least inert substrate are a better choice for shrimp tank for that reason (no PH/TDS swings). There is no right or wrong here.