Hey fam, in this build I’m showing you how I turn basic cement and foam into an artsy, ultra chill waterfall fish tank you can enjoy at home. I start by pouring cement into a simple wooden mold to form the tank base, and I always add steel wire inside for extra durability. Then I make a batch of little “cement cookies” that work like mini bricks—perfect for stacking the walls and adding cute details like corner towers and tiny stair steps. After the structure is up, I coat the whole base and walls with another cement layer to lock everything in. Next is the fun part: the waterfall system. I cut and join foam pieces into a flowing shape, brush on a cement wash to toughen it up, and paint it navy blue with white highlights for that mountain rock vibe. I finish the outside in a warm brown, add soil and a few plants for garden feel, then white sand and gravel for a clean natural look. My biggest pro tip: let a new cement tank soak for 5–7 days and then change the water—if you skip it, cement toxins can harm your fish. After that, fill it up, add fish, switch on the pump, and enjoy the hidden-waterfall vibes.