Is it possible to allow the colored water to sit for several hours. The sediments may settle so you can get some clear (or clearer) water to test. Just an idea.

Quote Originally Posted by SoHigh420
im using a Ph control kit from general hydroponics.

when i add nutrients to the water it turns a dark brown and its hard to get an accurate reading.

its also very difficult when i try to measure the Ph of my plants runoff.