02-15-2014, 08:56 PM
| || | River Stones and GH / KH
I just added about fourteen medium sized river stones
to my 20-gal tank. I don't know precisely what types of stone they are. Bought them at my LFS. They were packaged and labeled as river stones
for ponds and planters. They appear tumbled... rounded and very smooth. I doused them with white vinegar... no fizz at all. I disinfected them by placing them in a colander and pouring boiling water over them (twice).
I'm planning to test my pH tomorrow. I'm wondering if I should test hardness as well (I'll have to buy the appropriate test kit).
Until now, my pH has been a very stable 7.3 to 7.4. The city's tap water quality report for 2013 says my water at their treatment facility averages 9.5 dGH and 3.9 dKH. I have not measured hardness at home.
Can I expect these so-called river stones to change these parameters? How much change would be considered problematic for Red Phantom Tetras and Zebra Danios?