So after joining the club my tank quickly became over crowded with all the new corals, so I built this 20 gallon all in one as an upgrade. I took an old 20 long I had in the closet and ripped off the top rim and sanded the glass for safety. I got some acrylic and cut it down to size. I cut a half in return hole, and cut slits for skimming and draining. Painted the whole thing black and siliconed it in place. I water tested and found a leak. So i drained and patched the leaking area. The second water test was clear. I then put in a cobalt maxi jet 1200 and realized my skimmer slits didn't allow enough flow. I removed every other tooth and them had adequate flow. I used some light defuser grid to make a media basket. And tranfered some of the ceramic media from my pico tank to seed the new rock. I built a shelf from some reclaimed bricks from a friends fireplace deconstruction and some 8 inch planks held together with pocket hole screws. My wife stained and sealed them. I found some cloth baskets for storage/ hiding test kits and other aquarium stuff. I used a mix of carib sea life rock and dead rock from Aaron. I also put in an inch of caribsea aragonite sand. Starting dosing with microbacter Evaporation is much higher from this tank, so I got a thin piece of plexy as a lid. This severely reduced the evaporation. I drilled a few series of holes to allow for ventilation as well as collection points for condensation. Once the tank has finished its fishless cycle I'll move my AI Prime HD from my pico tank over with my corals.