Automatic watering

This automatic sprinkler interior would sprinkle a dozen plants from a bucket of water for a single programmable time for all plants (all plants do not require the same amount of water) if the connection pipe between the programming system and the submersible pump was not drilled about 5 cms. In addition, the jet copiously watered the programmer, I'm not sure that the product operates long at this rate.
The idea is great but it would require a hardware that works and is in good condition !!!!