oh, i just realized, i never answered about whether it is good to use or not. if they changed flourite to a more stratum style substrate, i wouldn't hesitate to use it. i have used both the fluval stratums, the red sea that i mentioned and a few ada substrates. i like the fluval stratums and the red sea. the ada, i thought were over rated and not worth the cycling times of about 6 weeks, when following ada's instruction. it goes through massive ammonia spikes before it finally stabilizes.

i really need to brush up on my planted aquarium knowledge, i didn't know they reformulated flourite, so i am glad you were persistent about it