Hi all, I got my results back the other day and I have a few problems. My tank is 90L softie/lps tank with 4 fish in it and I have never dosed anything but I always struggle with my phosphate and mag levels. I do a 10L water change every week and I test my salt every time before I do the water change. I don’t have much growth either I have a few zoa frags that are doing fine but never grow and spread and same with my mushrooms. No matter how hard I try I just can’t get my phosphate down to the right level and my mag is never stable. What do I do to keep everything nice and stable? Should I consider buy a dosing pump and how the hell do I get phosphate down?