Aquarium

An automatic fertiliser doser for the aquarium, made from a 230 V mechanical timer whose slow geared motor turned out to be just right for driving a syringe.

Feeding the plants in my indigenous aquarium with the Estimative Index: dosing macro and micro nutrients on a schedule instead of measuring them with test kits.

Bringing my childhood aquarium back as a low-cost, low-maintenance tank with local plants and fish, in the basement workshop for the kids to enjoy.