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I capture my water parameters in a spreadsheet so I can compare history and share the results of my tests with other hobbiests. Instead of keeping them on my hard drive, I thought I’d share them here on my blog.

My tank is a 75g reef tank. I try to test the water weekly, but as you’ll see sometimes I go 2 weeks. I test for Ca (Calcium), Mg (Magnesium), Alkalinity (dKH), PH and Phosphates (PH4). I use Elos test kits and have found them very easy to use and highly accurate.

Date Ca Mg Alk(dkh) Ph PH4 Salinity Temperature
Target 450 1500 12 8.2 1.025 - 1.026 81 degrees(f)
3/28/2008 250 1400 12 8.2 1.026 81 degrees(f)
4/6/2008 450 1400 1.026 81 degrees(f)
5/1/2008 430 1300 9 8.3 1.026 81 degrees(f)
5/17/2008 520 1700 8 - way too low, added some buffer 8.1 1.026 81 degrees(f)
5/23/2008 550 1500 12 8 Tested in the AM, so lower 0 1.027 Tad too high 80 degrees(f)
6/7/2008 390 1200 8 8.3 0 1.027 81 degrees(f)
7/19/2008 500+ 1700 6 8.2 0 1.027 78 degrees(f)

6/7/2008 - Ca, Mg, dKH are all too low. Added supplements to get parameters back to appropriate levels.