They look like pretty standard PH Meters, it'd be cool to test my PH consistantly.
http://www.extech.com/instrument/pro...500_pHORP.html
or
http://www.extech.com/instrument/pro...ph50water.html
They look like pretty standard PH Meters, it'd be cool to test my PH consistantly.
http://www.extech.com/instrument/pro...500_pHORP.html
or
http://www.extech.com/instrument/pro...ph50water.html
55 Gallon. One year old, and looking SUPER.