Sorry for the pause there folks! Had a couple of final projects n' such due these past few days.
In regards to the concerns,
I've added more plants, pics attached, do let me know if I should add more.
The clover is growing quite fast, so it should build up a carpet pretty soon.
Also added an Otto, had a bit of a brown algae/diatom outbreak, hoping it'll help clean that up.
I was careful in choosing my DP's, I do have a male and female to help keep aggression rate low.
And the bin is 17.5" x 8" x 9" making it about 5.5 gallons, a little small for them, but I've heard of pairs being kept successfully in a tank this size, so I'm giving that a go. They really haven't exhibited much aggression, just the occasional "Hey, that's my snail. Shoo!" But I'll keep my eye on them and separate if need be.
Thanks for your support guys!