Hi and thanks for your kind words!
I plant most of my marginals in plain pea gravel in perforated pots so they filter the water for my fish (no mechanical stuff). Waterlilies and lotus get solid pots with clay amendment in soil, and granulated Landon's fertilizer. I fertilize both these systems, weekly the solid pots, and sporadically (and only one at a time) the perforated. Or none at all for the basketed. Plants evolved to grow in dirt so you can never go wrong with a solid pot. But they won't filter the tub.
Latest edition of my book was published in SPring and I also do club talks via Soom if available. https://www.amazon.com/Tub-Pond-Handbook-Comprehensive-Container/dp/B091W9WLDP
keep on tubbin!
Dr. Ted