is Potassium required for reef???? Help??

[mandarin man]

Myka, you are right, there is a small square paper with the small hole. I did not know what it was so I threw it away. Could not find it... I hope it does not affect the test too much.

Tailor Aquatics also makes K in very high concentration (5ml per 100gal once a week; however, they don't specify the quantity of dosing). I assume it is high concentration. 500ml bottle is less than $20.

I agree with you all, the KZ K is the way to go