hydrophyte- the scale are on the large palm and the what I presume is a zephyranthes rain lily, both of which I got from you.
I will try your dunking method in a 5 gal bucket, I guess.
The roots on the African violet on the right are HUGE. Twice now, they grew from out of the bottom of the planter all the way down to the substrate in my tank, so I just cut them off. Would you like a picture? They were trimmed fairly recently, so I can only show the roots in the planter (if they are visible through the algae). It is actually tricky to move that plant around because it is so big, I am always worried about snapping the stem. It has grown accustomed to being supported by the edges of the tank, so when I take the planter out, it flops all around.