Wow, how do you get numbers like that? I totally ignore my system for months and all that will happen is a high normal alk and low normal ca?
I did have my mg hanging around 1000 for a few yrs, but that's what happens when you skimp on buying all the usual test kits
I'm not really sure on my worst readings, but in reccent yrs I can ID a few trends in my system, which has auto top off and both Ca and Kalk reactors. (I do recall seeing Ca drop to near 350 with alk at about 12 and mg at @ 1000 sometime in the past two yrs, but that's the worst I can think of?).
*with my set up, without any supplementation or adjustments, alk tends to climb slowly and Ca tends to decline a tiny bit.
*obviously SG will slowly decline due to skimming, but that's also a slow process.
*my mg steadily declines, not fast, but not all that slow compared to other parameter changes.
*if I see a diatom bloom for no reason, It's quite consistently that my DI cartridge is in need of replacement. (I don't have any silicate tests to back this up, but I've seen it over and over. Diatoms bloom, I replace DI, diatom bloom ceases?)
jk