i have a few different broms, part of a package from peace of the tropics. one of them is doing fantastic and growing. another is growing but is silghtly curled at the ends of each appendage. the third is very curled up, it has a light feel to it, all the "leaves" are curled up fairly tightly and it even has a few crisp brown edges. did i just get stuck with a brom that doesn't like my tank settings? or is there a way to fix this? thanks in advance...