Little interval of water dropper should be chosen for sand, but large interval of water dropper can be chosen for loam soil.

The study in this paper has the directive significance for choosing dripper discharge and interval of water dropper, as well as, designing irrigation quantity for line source drip irrigation.

Do not place the glass dropper directly into aquarium water unless you plan to thoroughly rinse it (inside and outside) with fresh water before placing dropper back into bottle;