What is the wattage of your lighting what kind of bulbs NO PC VHO
? How long are you running your lights how old are the bulbs the spectrum can shift after a period , how much and often are you doing water changes . What are your tests showing
Iodine and calcium should be tested before adding it
Be aware that purple up contains diffrent compounds such as Iodine , these can be overdosed if too much is used .
Coral food what foods are you using ?
Corals have "moods" the contract and expand we have ones that close and stay closed for a few days then open , shrooms
that shrink and expand daily when they eat ect .
What are your inhibitants fish ect ?