Hi all, I’ve been having some issues with one of my tanks. We started seeing some new algae on the sand a few weeks ago. It wasn’t bad but seemed a bit odd given that nothing had changed in the tank. Since then our 4 year old Azure damsel has died and our year old Abalone also died. There is one head on the frogspawn that isn’t looking great, but otherwise the coral and the rest of the livestock seem okay for now. The algae outbreak has gotten quite bad though, with two different types (see pictures). These problems started awhile ago with the loss of our Bullseye pistol shrimp and a few weeks later our YWG, but seemed to settle down. Parameters: Amm 0 Nitrite 0 Nitrate 0 Salinity 1.024 78F 4KH pH 8.4 Calcium 500+ (this shot up recently for seemingly no reason) Phosphate 0 Other than the calcium these parameters have been consistent for months and months. I will add chemi pure to the filter in case it is toxins from the sea apple, but from what I’ve read if that was the case the tank would be wiped out. We’re also siphoning out some of the algae and doing water changes, as they have been somewhat neglected. The remaining fish livestock are a pair of skunk clowns and a starry blenny, along with asst inverts, and a fromia starfish. The starry blenny seems a little more skittish than usual, but other than that everyone seems fine. Is there anything else it might be or we should do? The tank needs a rescape as is but it’s looking terrible and losing original livestock is upsetting.