I think you will find it nearly impossible to buy aquatic plant seeds online and get what you expect. As near as I can tell ALL of the sellers on amazon are plant seeds are either not aquatic plants, not what they say they are, or are just generally not good quality, possibly all 3. Additionally the term baby tears used to describe many different species some terrestrial, some aquatic. So even if you found true 'baby tears' they could still be a non-aquatic version. I bought some hair grass seeds from a reputable USA located nursery and purchased them by their scientific name, grew them outside and when I transplanted them indoors into a tank they all died. Meanwhile I am growing the exact 'same' species from tissue culture in another tank in my house with no issues. Soo yeah, I'm a bit salty these days on seed purchases. Anyway I suggest just getting what you need in pots or tissue culture and then doing a dry start if you want to grow them out quicker.