i agree it tends to compat but in proportion of more than 1/5 but if you use few doesn t happen if mix with corse bark. Coco is really good for some anthurium but if you keep plant in house give problem of white mold lot of times. Leca alterate ph is better just for wallet
I prefer perlite, for seedlings i prefer vermiculite because keep more water but guarantee less aeration than perlite, and both have neutral ph.