fishies-text/field-guide/en-GB/caring/cleaning.md
2026-11-13 23:37:55 +00:00

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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](https://fishies.lol/wiki/decorations) 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](https://fishies.lol/wiki/species/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.
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In the game: https://fishies.lol/wiki/mechanics/cleaning · Fishies 0.8.25
This page is generated. Its text lives in [`locales/en-GB.json`](../../../locales/en-GB.json) under `wiki.topics.cleaning`; correct it there.