Yes the jack's is a powder. It also has the micros in it. The MKP is just potassium and phosphorus. One of each. The MKP is used as a bloom booster. The yara adds calcium and nitrogen.
Yeh my water is hard hard. I use hydrochloric acid to clean the toilets occasionally when the scale is built up.
Here is a link to what the JAck's has in it:
http://www.jrpeters.com/Products/Hydroponics.html
Here is a link to the MKP:
http://customhydronutrients.com/zencart/index.php?main_page=product_info&cPath=1_46_29&products_id=5
As you can see the MKP is 0-52-34
Yeh my water is hard hard. I use hydrochloric acid to clean the toilets occasionally when the scale is built up.
Here is a link to what the JAck's has in it:
http://www.jrpeters.com/Products/Hydroponics.html
Here is a link to the MKP:
http://customhydronutrients.com/zencart/index.php?main_page=product_info&cPath=1_46_29&products_id=5
As you can see the MKP is 0-52-34