i used https://www.amazon.com/gp/product/B000I1R1EY/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1 when i repotted in the fall. tbd if they like it or not as only a couple plants have started coming back so far.
i tried https://www.amazon.com/gp/product/B07JDBVT7T/ref=ppx_yo_dt_b_asin_title_o08_s01?ie=UTF8&psc=1 as well and the half damn things floated away, i still fish them off the water, so i would not use those.

speaking of this reminds me i gotta jab some fertilizer tabs in soon