[foster]

Does anyone know the formula for making 4dKH water for drop checkers to test CO2 levels. I get the concept of baking soda, and distilled water, but I need the amounts of each>

 

[xmas_one]

It's on here somewhere, I think hoppy posted it. Try the search.

 

[ngrubich]

http://www.plantedtank.net/forums/showthread.php?t=42429

http://webcache.googleusercontent.c...rop+checker+solution&cd=2&hl=en&ct=clnk&gl=us