I've read from a post on Planetcatfish from a gentleman that actually collects Corys in the wild that most Corys are found on sand or mud, but not gravel or other substrates per se, and mostly in areas without much plant matter. Personally, I find my cories ADORE sand--they play in it, slide around in it, and shift through it. My only caution is to keep the sand shallow to avoid toxic gas buildup (plants help with this). --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/