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Algae & cleaning
Why the glass gets cloudy, and what slows it down.
How algae builds up
In a bare aquarium, algae starts to grow 4 hours after the last clean, and the glass gets gradually dirtier until you look after it.
Plants and decorations buy time
Every plant and decoration pushes that moment back a little, and plants do the most. The total is capped at 4 times the usual time, so decorations never make cleaning unnecessary. Each item in the decorations catalogue shows how long it keeps algae away on its own. A filter adds to that on top of the cap: a better filter keeps the glass clear for longer, up to twice as long, but it never cleans it for you.
Busy aquariums get dirty sooner
The more fish you keep, the faster the glass clouds over. Eggs count too.
- 6 fish or more: the glass stays clear for 85% of the usual time.
- 12 fish or more: 70% of the usual time.
- 18 fish or more: 60% of the usual time.
A fish that grazes the glass
A grown, fed Bristlenose Pleco grazes the glass, so algae builds up 1.5 times more slowly. It never scrubs the glass for you and never earns the cleaning reward, and a hungry pleco stops grazing until it's fed. Each aquarium can keep one.
Scrubbing the glass
Choose Clean and scrub with the sponge. Cleaning glass that has had time to get dirty pays a few coins and experience, while scrubbing glass that's already clear pays nothing. The experience grows with your level, with the size of the glass (an enlarged aquarium's glass pays double) and with how green the glass had got.
In the game: https://fishies.lol/wiki/mechanics/cleaning · Fishies 0.8.24
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