this would make sense since both ca epa and calosha have it listed. ca department of ag website is so bad its hard to find any info.I didn't see this sooner, but know the answer 🙂
There were changes to regulations in CA and as a result Seachem had to re-register Excel to be compliant, which takes time. Basically they need to re-label bottles sold in CA, once the paperwork goes through and the new labels approved they'll be able to ship to CA again. That's why some stores may still have it on their shelves (they *shouldn't*), but haven't been seeing them in shipments. I imagine the other "liquid CO2" products may be also caught up in this shortly, it all depends on how the labels read. Good ol' CA legislation for ya!