calcium levels

𝐌𝐢𝐬𝐬𝐞𝐝 𝐆𝐞𝐦! "𝑳𝒆𝒕'𝒔 𝑫𝒊𝒗𝒆 𝒊𝒏𝒕𝒐 𝑼𝒏𝒅𝒆𝒓𝒔𝒕𝒂𝒏𝒅𝒊𝒏𝒈 𝑪𝒂𝒍𝒄𝒊𝒖𝒎" Calcium is not just a dietary supplement for humans—it's a crucial player in the health and vibrancy of reef aquariums. This essential element is the backbone of coral growth, helping form the hard skeletons that are characteristic of...

Hi there, I have a lightly stocked tank with coraline growing fine. I mostly have LPS with a couple smallish frags of SPS. I tested calcium a four days ago and it was low (370) so I buffered it up to 420. I tested it again today (4 days later) and it seems to be back down to about 370. I...