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Algae & cleaning
Why the glass gets cloudy, and what slows it down.
How algae builds up
Algae feeds on the nutrients in the water. One gauge counts them: the water adds 20 an hour, every fish adds 1 an hour (eggs count too) and every meal adds 3 at once. When the gauge reaches 100, the glass turns green. Open Water and equipment to see every source and every helper on its own row.
Plants and decorations buy time
Plants and decorations take nutrients out: each point of care removes 6.25 an hour, up to 18.75 an hour from all of them together, so the best planting keeps an aquarium clear about 4 times longer. Each item in the decorations catalogue shows how long it holds algae off on its own. A filter takes out more: 3 for a sponge filter, 6 for a power filter, 8 for a canister filter, and 4 more from the refugium chamber inside the canister. Enough helpers can hold the gauge level for good.
What fills the gauge
A busy aquarium fills it faster. Three things push it up:
- The water itself: 20 an hour, always.
- Each fish or egg in the aquarium (a fish that has died stays until you net it): 1 an hour.
- Each meal, from your hand or a feeder: 3 at once.
A fish that grazes the glass
A grown, fed Bristlenose Pleco is a helper too: it takes 5 nutrients an hour out of the water. It never scrubs the glass for you and never earns the wipe 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 whenever you like; there is no waiting. A wipe harvests the algae that has built up: it empties the gauge and gathers scrapings, coins and experience in proportion to how full it was, and a glass under 10% has nothing worth wiping. Coins and experience grow with your level, like a quest's reward, and with the size of the glass (an enlarged aquarium's glass pays double). Leave a full gauge alone and the glass greens over and the fish suffer.
In the game: https://fishies.lol/wiki/mechanics/cleaning · Fishies 0.8.26
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