Hi All! I would like to know your opinion about my plants? I don't know what happened to them. These are the Symptoms: My red plants, like Rotala,ludwigia repens,echinodorus x barthii, lost their red colour. First they were dark red, and then became brown. they don1t seem to have any deficiencies, and grow fast, but I don't know why is the colour-changing. The only thing that changed is the KH of the water from 6 to 8, the temperature raised because of the heat outside. I changed the micro nutrition from Easy life to EI method dosing (Haacks Micro+). what can be responsible for my plants?