Tanks should be 10gal for a single boy or 3 girls.
Tubs can be smaller, providing they have a full wire mesh lid.
How much rain? How big are the tanks? How big is the catchment area?
Mice have big ears because they need them to survive. Mice have very sensitive hearing to help them hear predators.
How big are the two tanks, and how many guppies do you have
Tanks
"My oldest brother's pet mice are as big as yours."
sometimes 100s of L
Aquaponics.
Just one big one
by sound by those big tanks thingys
They are called army tanks.
around 10 cm
The top three manufacturers of chemical tanks in the US are Pro Tanks, Pressure Chemical Co. and Mix Tanks. The regulation and containment of chemicals in the US is a big business.