GHL PH Probe second one ok for a freshwater tank?

[leedsrhinojohn]

Ive just got a profilux 4e and im wondering if I buy another ph probe can I use this on my Discus tank or is it saltwater only?

 

[vangvace]

Yes you can. Profilux is useable on freshwater. With the 4e you will also need to buy an expansion card if you want to monitor the pH of both tanks at the same time. There are a few options available in case you want pH and something else monitored. Depending on your plans and how far apart the tanks are, an expansion box could be a wise investment.