Here's some general examples of smaller plastic chemical and plating tanks. You'll notice that some are elevated by welding risers to the bottom. This is one of the many things that can be done to your plastic polypropylene tank. Other options include extra supports, flanges, gussets, inlets and outlets including half-couplings, through couplings, and flanges. You can also specify a cover which is usually a shoebox-type cover welded out of plastic. Send us your drawing and we'll see if our experienced fabricators have any suggestions for you.