Originally Posted by
brewmaster15
Jim, your tanks pH swings are okay for the Discus at this point. The problem will happen down the road where you may get busy or go on vacation and regular water changes Lag. Soft water is prone to pH crashes and with insufficient water changes over time drift down. Still I would rather have soft water(great for breeding) than hardwater. You can easily buffer your water by adding some crushed coral or oyster shells in a nylon stocking to your filter. That will help stabilize the pH . Its a bit trial and error but 1 cup per 55 gals is a good starting point.
Hth,
Al