good Bentonite Clay supplier in Europe (or even Spain...)

Go to www.biotraxx.eu The company is in Germany, when they shipped product to me it was sent from The Netherlands. They sell water purification drops as well, once you go to their website you can check their product catalogue. I would be happy to order from them again.

Heiltropfen is a good brand that I would trust. Gets good reviews too on Amazon (checked on fakespot.com and passes). Available on Amazon and their own store at heiltropfen.de.

A few months ago I bought two different brands on ebay after reading lots of reviews and opinions (really do your research and watch out for commercial pushers). I finally settled for Living Clay and Redmond Clay.