monitoring tanks Temp, PH, salinity?

[TimaT]

what would be the cheapest way to monitor the tanks TEMPERATURE, PH, AND SALINITY? (without testing the system )

the reefkeeper that has those functions (and tons of other functions that i dont need) costs over 400bucks.

is there something cheaper out there?
THANKS

 

[Gregcoyote]

There are several cheap Ph/temperature monitors out there. Bulk reef sells them as well as EBay. Salinity is trickier. The ReefKeeper system I have offered one, but I am uncertain if they ever shipped any. I would like a good salinity monitor too.

 

[TimaT]

thanks going to look into that.

 

[chbix]

Search eBay for a salinity monitor. There is one that is a ph/salinity combo. Listed for $100 shipped. It's from Japan, not sure on quality but was thinking if getting one as well.....