Both pothos, and certain kinds of moss love water, and other plants... they know us at the local lowes and greenhouse quite well. Tis now the season to get some prime sand(for under the gravel) and some plants or bulbs from plants in your local streams. Theres also some grasses i find in ponds that grow under water. Rinse all the muck off and see if they take to your sand!
We gots bullfrog tads(btw bill i donated a clutch to the local vo tech for the horticulture class pond) and ima keep 1. For their home i just stuck a shovel in the side of the pond and brought it home in a bucket lmao. Water too. Downfall, the wretched smell, things growing like mad tho and i look for it to be ready for the froglet when its time... the pond is now backfilled... broke my heart lol