Hey guys just need some advice here. I figured I'll just continue the this thread instead of starting a new one. Anyways, I've been monitoring my water a little more closely and found that my calcium always read at 550. I'm using elos kit here. I either can't test this correctly or is it really at 550. I change my water every week. I stopped using kalkwasser for now. Corals seem fine. I just tested water this morning.