I hope you see this RT.

One thing about that post, would using a regular timer, as opposed to the one you posted, work? Like setting it to run one day for a couple of minutes (after I test the rate of transfer).

I have an aquarium pump and tubing. I have three shrubs, so I would probably splice the tubing into 3 parts and insert it into each pot.

Thanks again. This site has been an inspiration and a library of knowledge.