Can anyone verify what type of deficiency my plants are suffering from? I'm leaning towards potassium but am not sure. I use the EI method with with GH booster. I also use seachem flourish Excel daily and API plant food once a week after water changes. I recently upgraded to a 30 gallon tall from a 15 gallon tall which is when I started noticing the difference. I doubled dosage of everything once I upgraded. I took pictures to the best of my ability to remove the glare but some of the leaves are turning yellow on edges and/or developing holes around the edges as well.
