400 gallon project

[Myka]

Originally Posted by untamed

Phosphates are also slightly high, measuring 12ppm yesterday.

Is that a misprint? I freak out if my phosphate reaches 1.0 ppm! What are you using to test phosphate and nitrate?

I'm glad to hear you have figured out the problem. Sometimes automation kicks our butts doesn't it? Eep! I look forward to hearing about the turn around!

[untamed]

Originally Posted by Myka

Is that a misprint? I freak out if my phosphate reaches 1.0 ppm! What are you using to test phosphate and nitrate?

I'm glad to hear you have figured out the problem. Sometimes automation kicks our butts doesn't it? Eep! I look forward to hearing about the turn around!

Phosphate - Hanna low range colorimeter
Nitrate - American Marine Nitrate Moniter (probe)

How are you able to detect 1ppm of phosphate? The Colorimeter isn't accurate to more than about 1ppm.