Quote:
Originally Posted by spedly
Well I'm at a loss...
After discovering that my salinity was off I have spent the past couple of weeks getting it back up to normal levels. After a water change today, I calibrated my refractometer with the Pinpoint solution and measured the salinity in my tank at 1.025. Not the 1.026 I was hoping for but definitely within reason.
A couple of hours later I went to the grocery store to buy a jug of distilled water then used my Hanna checker to measure calcium and.....381. Hrmph. I feel like I'm back where I'm started. I'm still not seeing calcium levels others are seeing.
There are three variables that might be throwing stuff off:
- Pinpoint solution. Does this stuff expire? It's a couple of years old but was never opened until two weeks ago. Should it be shaken before use?
- Refractometer. Should I compare it at the LFS? Is it "spoiled" since I've only used RO/DI for calibration up to this point?
- Bad batch of salt mix? I'm at the end of the current bucket and will have to open a new bucket next week. Maybe wait and see what I measure from that before taking next steps?
I feel like I'm missing something obvious or maybe just have a bad batch of salt.
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I don't know if this helps, but I was reading a thread over on RC last night about this calibration solution being way off. The poster was doubting it, ended up making his own calibration solution with a recipe found online, and discovered the pinpoint stuff was actually at 38 ppt
. If yours is also high this would explain why your calcium is low. I am using the AF reef salt and it mixes in the 410 - 415 range @ 1.026
http://www.reefcentral.com/forums/sh...ation+solution