I can't use spag, always rots my orchids roots. And ive tried coco chips which alot of orchid growers use but find they break down quickly and grow green alge or something on the chips and seem to harbour pests better than bark. (yeah i know i shouldn/t have any pests). hehe! And it says wet longer than bark causing rot if your not careful. I now use big bags of orchid pine bark nuggets and find them the best so far, have'nt had any orchids die in bark.. yet! I mix perlite and maybe lava rock or red scoria depending on the orchid with the bark.
