One of my flowering plants has been overfertilized and now the bottom leaves are beginning to turn yellow and die. My question is should I put plain water in the reservoir and if so for how long? The leaves are curling to the point that they are claw shaped. I was thinking plain water until the plant looks normal again and then change the water to full strength nutes? This plant has been flowering for 3 and a half weeks. Thanks in advance for any advice.