[Aquattro]

Tony, I used extruded acrylic (1/8" wall) for my reactor and it's fine. The tubing cost was very cheap. As long as the surfaces are perfect and you bond it properly, it is more than strong enough. Cast will give you a bit more clarity as it doesn't have any ripples in it from processing. I built my reactor with pump for about $100. I found a used tank for $100, you just need to look around. J&L has regulators and needle valves that are decently priced. Email Allen for pricing.