Free tds meter

[DonW]

Just stumbled onto this. Dont know if its accurate but its free if someone wants to give it a shot.

Don

http://www.buy.com/prod//q/loc/63024/204941998.html

 

[prbhasson]

It's real I ordered mine last week. I don't know how long they will do it. It is posted on all the major reefing sites....