How do i keep these plants?

Question

How do i keep these plants?

cactus: mammillaria albilanata

and

baby tears (soleirolia soleirolii)

how big will they get and how do i keep them

i also have a baby tears sold as an aquatic plant in my aquarium. is this the same plant just submerged

Answer 1

dont know about plant care.

but the baby tears used in aquariums is hemianthus micranthemoides. so you have a different type probably not suited for aquatics