I only have a pair of clown that i feed every other day and i have around 5ppm nitrate and always 0 po4. How come i have to clean the glass twice a day ? i don't do water changes as i dose trace elements aswell. My corals aren't looking great and i dont know what to do anymore. Skimmer has been off. As algea is still growing i added some gfo but not much has changed. What can i do ? I'm feeling desperated