Here are a few I've used...they have trial versions:
http://www.tankminder.com
http://download.cnet.com/downloads/0-10052-107-883809.html
I think this one is more for x10 stuff:
http://www.infinitysoft.net/ReefCon
With the flex PVC can you glue it into a slip union or a slip ball valve like you can standard PVC?
[ December 29, 2001: Message edited by: crimsoncoral ]</p>
A few months ago someone posted something in regards to rubbermaid containers causing adverse conditions to a reef tank. I can't seem to find the thread. Does anyone have any information on this? Thank you.