meter

So anyone need a digital ph meter with probe and calibration solutions? I'm getting rid of mine. $140 obo Willing to trade for good quiet filters also. Sent from my iPhone using MonsterAquariaNetwork app

Does anyone have a good TDS/PH/Temp electronic meter all in one they like to use a lot? I know about Hanna.. they run about 130.00 or so.... just wondering if there are any others out there? Maybe a little less expensive but just as good? I know this has been discussed before... but not in...

I'm looking for an inexpensive ORP meter is anyone has one laying around.