besseae likes water. very pure water. a term i've heard is that you have to "sneak fertilizer in". i don't think the plant will suffer if one never fertilizes it. it doesn't like to be sopping wet, but it certainly does not grow dry like a caudatum. in fact, growing besseae dry is a good way to exacerbate the salt issue.
the biggest issue with besseae, in my experience, is keeping the roots cool. i had success for a long time with clay pots and NZ sphagnum. roots nice and chilly from evaporative cooling. i moved to s/h near the end of last summer with good results up until now. the dog days of summer took their toll, even with s/h, and the plants were not doing so hot. i suspect the root zone temps to be the culprit, so back into clay/sphag they went.