My tank has been up for a year now and im not a noob with parameters so this is really starting to tick me off. I have my alk locked around 9.0 to 9.6 thats the most it will ever change in a month which is when i notice it and then it slowly drops abit. Out of no where my shades of fall crayola and pearlberry had there tips burn off. My parameters are perfict only thing i dont check is the really odd things like potassium and other elements that dont burn the tips off. last time it happend i did a water change and they seem to get better- i dont do much water changes because my amonnia or nitrates or nitrites never go up or are traceable so do you think its a basic elemnt that is added during a water change that will help the coral? Im really at a loss and dont wanto lose my shades of fall that finnaly just started to explode.