how can i create a 30 gallon sump DIY
What's up bvega? I like to see people doing DIY projects.... It makes the hobby much more interesting. Anyways I built my own Sump/Refugium out of a 40g breeder.
I guess what u have to ask yourself is what do you plan on doing with the sump. Then depending on the type of system you wanna run I could help you further. But as far as baffles go, I used c**** plastics for the acrylic & used egg crate to build racks. Pretty cool stuff I'll upload a pic for you.