[AquaticLife] Stones
You can test the rocks to see if they will leach. This article explains how. http://www.uniquaria.com/articles/sr.html
This article goes into much more detail about rocks. http://www.skepticalaquarist.com/docs/aquascaping/rocks.shtml
Getting rocks from a landscaping company or plant nursery is an affordable way to use rocks in a tank… much less expensive than buying the rocks from a pet/fish store.
Lenny Vasbinder Fish Blog - http://GoldLenny.blogspot.com
P.S. - Are you talking about today as in Friday or this 24 hour period?
Category: Philippines Internet Koi Society
