Hmmm...a canna care home service would be nice. Cannascaping Svcs, Mary Jane Maids, Joint Ventuers inc...

Perhaps it's something for the dispensaries or hydro shops to look into. Could be a lucrative business for those that need to travel, but are tied to their medical growrooms.

Perhaps a web-cam set-up and a controller valve for watering on demand...?

3 weeks is a long time for water to sit. Would suck if it drained or evaporated too soon. I wonder if putting the pump in the toilet would work...? (it would automatically refill)