There what are you going to use the acrylic for since you already have the 25g for the sump. If for baffles I'd see about using glass instead unless the 25g is acrylic also. If so you can pick some up at either Regal plastics or another place there close by to it. They can also cut it for you if you know the exact size you need. I'm using an Iwaki that pumps around 950gph and have it on a SQWD and am happy with it but I'm not doing SPS so not needing a ton of flow. You could also go with a pump up to around 1500gph if you want more flow and make a manifold for your return.