Pine Bark Fines - size and quality?

[Duh_Vinci]

Spring is here, hardening off my container varieties, and re-using some of the last year's container medium.

I usually do well with mixture of perlite, potting mix (stagreen), little compost and little mushroom compost. But it does get somewhat compacted toward mid/late season.

This year is the first time adding pine bark fines as many suggest and use with success. But for the life of me, can't find any in the local stores! Everything I looked at - either huge chunks or from what I can see, about 50/50 mix of bark and wood, so nothing suitable to buy in bags (checked Walmart, HD and Lowe's)

I stopped by a local place that does mulch and topsoil, and this is what they have in bulk:




There are still some smaller wood chips, but majority is actual bark. From your experience, what you see above in terms of particle size and content - is it suitable for container mix (to add to the other ingredients)? Non-SWC

Regards,
D