I heard on the forum that certain plants are sensitive to Excel. The ones I heard about are Anacharis and vals. I have both. I was dosing Excel every other day and my Anacharis were turning white and all the leaves were falling off from the base toward the tip, till only an inch at the tip was green. I stopped dosing Excel a couple weeks ago based on the advice and the Anacharis is growing back. There is now about 2.5 inches of healthy looking green plant tissue at the tips. I appreciate the advice. Now I'm wondering what other plants are sensitive to Excel. Does anyone have a list or know of any other sensitive plants?