The ARKA Biotechnologie company has various brands for the aquaristic market under its wing. E.g. the products of the Vida series offer aquarists many possibilities in the field of automated addition of liquid fertilizers. In addition to programmable dosing pumps, the manufacturer also offers other accessories such as suitable hoses, holders and storage containers. The ARKA dosing systems are characterised by a built-in stirring magnet which ensures that no deposits can form at the bottom of the bottle. Another well thought-out, innovative feature is automatic hose purging. This ensures consistent storage of the liquids in the container provided for this purpose and they are not exposed to oxidation and incidence of light due to the fact that they remain in the hose, which can influence their shelf life.