calcification

I am sure someone has posted it somewhere on this forum but I have done a quick search and read a few threads so thought I would post instead. I purchased a used tank and there is some saltwater residue, calcification or haze or something that I cannot remove. I have used the following...

Tank info: Currently battling dinos and am making decent progress due to more hair, coraline, and film algae showing up. In range of reef tank parameters apart from phosphates which are elevated to encourage Dino competitions. Description: this algae looks like brown dots, and i can’t blow it...

Hello, My magnesium is at 1395 and calcium 420 and 9.6 dkh. I know that magnesium level is high. Since calcium and alkalinity are attracted to each other to cause calcification and magnesium is to balance out the process of that, can that high of magnesium cause calcification to be slower?