One glass box and everything that has to agree inside it. Set the tank, scape the sand, plant the green, stock the school — then watch it swim, and see if your water report comes back clean.
| Tank | Pick the glass — 60, 90 or 120 cm — then give it a filter and a heater. The filter sets how much life the water can carry; the heater is what makes tropical fish possible. |
| Scape | Stone, wood, plants and one or two things no serious aquascaper would admit to owning. Pick a piece, click the sand to set it, R to rotate. Click a placed piece to pick it back up. |
| Stock | Choose a species, then click the water to release one. Schooling fish want company — watch the school minimums. Use the net to click a swimmer and take it back. Shift-click a species chip to remove one quickly. |
| Style | Sand, background film, cabinet and the room around it. No wrong answers. Some more right than others. |
| Report | The water test wants eight boxes ticked: filtered water, the right temperature, a tank big enough for everyone, full schools, peaceful neighbors, places to hide, all three swim levels lived-in, and a bioload the filter can breathe under. |
| Feed | Press F. It does nothing for your score. It is still the best button in the studio. |
| Share | ↗ Share packs the whole tank into a link or short code — it opens straight in anyone’s studio. You can also download a .json or save a photo. |
Five finished tanks, five different answers to the same pane of glass. Open one and restock it however you like — your own tank stays safe until you edit.