Feed & grow
Food boosts happiness and growth, and happy fish earn coins every minute. Visitor requests, selling, and photo orders pay too. Two adults can share the breeding nook and hatch a fry.
A tiny aquarium management game
Build and manage your own aquarium.
COINS20.0
FISH1/3
WATER92%
INCOME+1.0/m
THE WINDOW TANK
DAY 1
Choose a decoration, then drag it in the tank.
Water quality is low — clean the tank
Feed the fish to begin
Glass Guppy
Common · Ember
Growth 24%
Hunger 78
Bond 0/5
Calm · hunger falls more slowly
Keeper's field notes
A calm loop with just enough to do.
Maintain the habitat
Water slowly clouds. Clean it yourself or upgrade the filter for a steadier tank.
Collect the school
Adopt a species, breed color variants, and sell the fish you do not want to keep. After the first hatch, a visitor may ask for a photo of a color, a size, or a species.
About the game
Tideglass FAQ
Is Tideglass free?
Yes. It runs entirely in your browser with no account or download.
Does my aquarium keep progressing?
Your aquarium is stored on this device and earns a small amount while you are away, capped at two hours. An older save on this device is brought forward with your fish, coins, and upgrades intact.
How does breeding work?
Grow any two fish to 50% and open the breeding nook. One pair can nest at a time. The fry hatches in about a minute and may show a new color. Matching, well-grown adults sometimes produce a rarer species.
What is coming next?
Fish personalities, habitat events, movable decorations, and aquarium photos are already in the tank. Richer event chains and more display choices are next.