We haven't brought in the fowlr version yet. If you would like to give it a try then let us know and we might be able to add a box or a bucket to our most recent order. It was supposed to ship out yesterday but I haven't seen the tracking info for the shipment so maybe I might be able to sneak it in for you.
No worries with your next order. I am in the midst of the build and hoping to have water in it by end of September. Would likely order around 6 boxes. Have heard good things he about this line of salt but mostly from European and Australian channels.