Question on Phosphate Test Kit

JamesBC

Junior Poster
Apr 6, 2008
5
0
1
Is it normal for the API Phosphate test kit to show bright blue when only K2S04 has been added?

Since my new planted tank shows bright blue with the test kit after dosing I decided to check somethings, clean tap water shows negative for phosphate but adding one drop of my mix of Potassium Sulphate(K2S04) and the test then shows bright blue.

I use the term bright blue since it is at or above the 10PPM range of phosphate.

Right now just dosing the tank with KN03 and Trace.

Well thanks for any help,,advice
 

aquabillpers

Lifetime Charter Member
Lifetime Member
Jan 24, 2005
639
3
18
I can't answer that question, but when I evaluated phosphate test kits 2 years ago, Seachem's kit was clearly more accurate than several others. They also included a test solution with it.

Bill
 

aquabillpers

Lifetime Charter Member
Lifetime Member
Jan 24, 2005
639
3
18
I can't answer that question, but when I evaluated phosphate test kits 2 years ago, Seachem's kit was clearly more accurate than several others. They also included a test solution with it.

Bill