My potassium levels were through the roof, and the timer for my co2 somehow went haywire and left it on for three days, and poof. Everything is covered in hair algae.
Changed my dosing regime to compensate! Thanks for your help!
Not sure what you are using to measure potassium, nor what you define as "through the roof."
In general, potassium levels can be quite high without any apparent harm to livestock.