It's hard to take photos of the back because the tank is inside a cabinet. Also feather duster worms decided to make babies and have encrusted the back of the tank. Basically I have a pump with a swaying head for water circulation (on the left corner) and a hang on Rio protein skimmer (on the right side)(It's somewhat noisy b/c it blows air into the water to collect particles but it is really helpful), two heaters (in case one fails and I had a extra one anyway) behind all the rock. I've kept the tank simple though the are all sorts of expensive tools I could get.
The goby is on a blue mushroom. The blue mushrooms far too over priced locally so I had this one imported from USA with zooanthids (impossible to kill) before the weather got cold as divisions of another reefers collection. They are not quite a coral and not quite an anemone. It is one of the first things I put in as they are hardy and clones themself fast. I think the 2.5 will have mostly mushrooms because they like nutrient rich waters too and low lighting. My 2.5 is even simplier in design, just a protein skimmer and heater and a 9W reef bulb. And cheap reef rubble (broken chunks of live rock that is left over in the live rock tank) as the base
I agree I had to read through a lot of crap on the reef forums. I barely visit them now