Welcome Aboard!! We're happy to have you here at Captive Reefing and invite you set down your roots and share your new set up progress with us!! You actually have a better start than you realize on some of those terms! Soon enough you'll know them all.
DSB = deep sand bed
LF or LFS? = Live Fish Store
What is detrius? Some of it can be what you wrote there. Decomposing matter from dead organisms....meaning dead fish, food matter, and all the good stuff that settles in the bottom of your tank that accumulates naturally in a reef environment.
Calpura and chaeto are forms or macro algaes. Generally used in the refugium for nitrate export for your main tank. If you ever need chaeto to start your refuge, ask on the board for assistance. There's usually a reefer here that is happy to send you some of this quick multiplying algae!
Algae: You'll run in to all sorts of this stuff in your tank as I'm sure you already encountered in your african chiclid tank. There's green algae, cyano or what some call red algae, hair algae, brown algae..... when you experience then you will know what they are. That's when the board comes in handy. We've all had them and we all have ways of curing them. Generally our ways all match, so there's not much advice here that's bad.
When you post a question or comment, many people will answer and comment with additions, solutions, and ideas to help you with a question. No question is ever a dumb one so please always ask if you have one!
Again, welcome to CR!!