I want to redo my son's tank of corys and tetras with PFS and decided to try some plants. Two weeks ago. I went to an auction in Raleigh and people were paying over 20 bucks for rare plants. Can someone recommend a few species of hardy plants that are affordable and won't overtake the tank the first time I'm gone a week. This is for a 40g breeder that currently has tetras and corys. Next time I can drive for work up to MD I will pick up some electric blue rams from Fank, which will be the center piece for this setup. Thanks in advance!