I can't seem to get rid of my blue-green algae, no matter what I do.
1) maracyn 1 treatment but the algae comes back
2) less light, more light, no light, different and various ways to find the right lighting
3) upped the nitrates and phosphates method
To make a long story short, I want to break away from the EI method of fertilizing and try to find my ideal ppm for nitrates, phosphates and potassium and see if I try to fine tune the water parameters, I might fix the bga.
That said, how do you measure potassium?
when I searched the net, I found some kits but they are expensive for this one element. does anyone have a cheaper way than this kit?: