I have tried or rather used the chunkier bark.My desert rose,sans,asparagus fern thats what i can think of oh and my leaf cactus are planted in the chunky mix.It works great i love it for them plants,some one told me that i should NEVER use bark that big it held to much moisture, the bark stayed wet a long time and would cause root rot.I haven't had that problem at all.Sometimes it seems i get a bag with more perlite than others but the but the orchid mix does have hardly any if any at all can't exactly remember.It early & i'm suppose to be getting ready to go to the dr.
I had the same worries when i mixed the to soils together in the pictures but honestly,i water very little in winter & have lost nothing i don't think.In the summer they stay moist the day i water & slowly dry out and are dry within 2 days & i water again on 3rd or 4th day depending on how hot it is here.We have such hot summers this mix works great for me here.I have been using it since last summer.
I even use it in (my kids call it the neonatal unit) for the leaves i just can't throw away here i think i have a picture of my nicu.
I have some a few that have grown up nicely and are ready for new homes this spring.The 2 on the left that look just alike ones bigger than the other,if anyone has any idea what type of plant this may be please voice your opinion.I don't remember were they came from & they have been in there growing for some time now.