The 1/2 inch cloth works fine for me. I did water bottles for the first few months when I started breeding rats. I don't have a sink near my snake and rat room, so I was taking the bottles, putting them all in a bucket and carrying them up to the kitchen to refill. Doing that every single day when I got home from work got to be too much. I got my watering system from Reptile Basics and it's SOOOO much easier and more efficient to fill the 3 gallon bucket once every 3 or 4 days than it was refilling 6-10 water bottles every day.
Reptile Basics has everything you need for the system. (You can find most of what you need at local hardware stores as well, but I found it easier to order everything at once from RBI)
Reservoir with quick connect - http://www.reptilebasics.com/3-gallon-resevoir
Drinking valves - http://www.reptilebasics.com/rodent-...rinking-valve/ (one per tub obviously)
Water tubing - http://www.reptilebasics.com/flexible-water-tubing (as much as you think you need)
T-valves - http://www.reptilebasics.com/3-16-t-fitting (one for each tub)
Drain valve - http://www.reptilebasics.com/quick-connect-drain-valve
I can try to get pics of the setup on my rack tonight if you want...
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