Plan your tank in 3D before you spend a cent.
Shape the substrate, place stone and driftwood, plant a carpet, add a school of fish, then orbit the tank and see how it looks.
Free to start. Rare items cost coins, no subscription.
Shape the floor, then plant it
Sculpt hills and valleys into the substrate with a brush. Place stone, driftwood and decor, then plant stems, carpets and rosettes where you want them. Pick a tank from a small nano cube to a 180 cm display tank.
Check it before you buy it
Fish swim in schools and keep to their own water level. The Summary panel warns you about fish that do not belong together and shows when the tank is getting crowded. More than 140 fish, plants, stones and decor items come with notes.
Begin from 21 sample layouts
Start from an example or an empty tank. Save a photo or a 10 second video of your tank, or send the tank file to a friend. Your Living tank grows plants over real days, even when the app is closed, and widgets show how it is doing.
No ads, no gacha, no weekly plan
Common species, plants and decor are free. Rare fish, color strains and large tanks cost coins. Coins come in one-time packs, never expire and are not a subscription. What you unlock is yours for good.
Underglass is a design tool. Always check the needs of real fish and plants before you buy them.