From what I've read, the only real way to have freshwater plants in brackish (Amazon Swords for example) is to start your tank out freshwater, let the plant establish itself and start new growth, and then slowly move the tank to Brackish. If you put the plant in brackish to begin with, it will be ok for a while, but will just slowly die. Adamj had a large Java fern or Amazon sword in his tank, perhaps he can let us know how its doing.
Otherwise I'd go with Soulfish's idea. Try at the very least to find a plant to order online that has at least been acclimated to brackish already. Me personally I just have a wack load of plastic plants, driftwood and rock in my 77gal Brackish.
__________________ 5gal : Planted and cycling. 10gal : 2 Harlequin Rasbora's, 3 White Cloud Minnows, 1 Common Pleco, 2 Fathead Minnows, assorted plants 34gal : 6 Black Skirt Tetra's, 4 Tiger Barbs(3 Albino), 4 Red-tailed Green Cory's, 3 Silver Mollies, 1 Bristlenose Pleco, 1 Bumblebee Catfish, 1 Crayfish, assorted plants 77gal : Brackish tank, 3 Colombian Sharks, 5 Knight Gobies, 2 Archerfish |