A calcium additive shouldn't affect ammonia or nitrates levels. If you had such disasterous results the first time, don't add it again. For starters, an alkalinity of 19.6 dkh
is off the scale and is contributing to the low calcium.
Just out of curiousity, where does your water come from, tap or RO
. Have you tested your freshly made SW
for pH, calcium and alk
? I would recommend you add a calcium chloride supplement like Kent's Turbo calcium to bring up the Ca
levels and this should also get the alk
. back in line. Test daily while doing the adjustments to be sure you are within params. Once you get the numbers back to normal (Ca
=380-450ppm and alk
7-11dkh) then go with a balanced Ca
supplement to keep the two in check. Also, make sure your test kits are not outdated and are accurate. Be sure that your fresh SW
is giving you proper Ca
and correct as necessary before water changes.
Also, read this article...you are in zone 3..