I have a bunch of fresh water fish tanks and I have been feeding my girls with the water I take from the tanks when I do water changes. I started off with awesome soil mix from tons of research that included worm castings and crushed lime. I have been amazed and very excited from the outcome. I have noticed that my tallest most beautiful lass has discarded a lot of leaves that have turned yellow and fallen off. I have attributed this to my water being potassium deficient. I am still trying to find a good organic way to provide the (K) to them but have not found anything yet. I was thinking I would try a Potassium, manganese, phosphorus blend, anyone got any helpful pointers on a 100% organic blend? My plants are in the 3rd week of flower, they will flower for 9-11 weeks total. They are White Widow. Thanks