Interesting Case

[Lance]

Does the sump chamber where he doses have fairly low flow, or is he dosing the calcium and alk too soon to each other? I had the same problem for awhile in the 90g, (though not as extreme). I use the same recipe, and found if I dose the calcium and the alk into the same chamber I have to make sure there is at least 6 hours between the dosing times or I get calcification. In fact the water in that chamber was even a little milky from the two reacting together. I eventually moved the calcium dosing line to a different part of the sump that has more flow and that helped a lot. Within days after doing this the volume of calcium and alk I needed to dose to keep parameters in line dropped considerably.