CStrickland
New member
I been keeping an eye out for these on sale cause with my tank upgrade I'm going to be cooking a bunch of rock. Just bought one for $30 w/ free prime shipping on amazon: http://smile.amazon.com/Hanna-Instr...2208&sr=8-1&keywords=hanna+phosphorus+checker
Thought I'd share in case anybody else has been putting off buying one
Thought I'd share in case anybody else has been putting off buying one
