Were the storage tanks taken out in a recent update?

They seem to be missing on Sky Factory 3

Ta

Is there a reason why the blocks were blacklisted?

Skyfactory 3 has the mods Flux Storage disabled by default. In the files Remove.zs (scripts folder) and itemBlacklist.cfg (config/JEI folder).

What I heard was that there was a dupe bug (of RF) possible somehow. Sorry, I don't know the exact details and I'm not sure if it was fixed or not in the mod. It wasn't stability/crash bug, so if you're not worried really worried about RF duping you should be clear to turn it back on.

Duping issue will be fixed in the next update.