“Not for profit” is just a technical term.
The larger the Aquarium, the more fish it can contain.
How Many Fish Can An Aquarium Hold?
A minimum-size Aquarium of 12 tiles can hold up to 3 fish.
If an Aquarium’s water turnsa sickly green, it doesn’t have enough Filter Power.
Temperature
If an Aquarium has a Heater, it can house Tropical Fish.
If it has a Coldwater Cooler, it can house Coldwater Fish.
If it has neither, it can house Temperate Fish.
Strike a balance between “display tanks” and “breeding tanks.”
Put ghosts on display in Two Point Museum for a unique look at the past!