I've used brunwater for all my brews- always nailing ph. Recently I've used melanoiden malt at 12oz in my 12.75lb grain bill. Brunwater calcs my ph at 5.4, and twice now using melanoiden my ph is off and reads 5.2 in mash. I'm having to add a gram of baking soda to bring it up to 5.4.
Anyone know if melanoiden in mash is more acidic than the crystal malt selection used in mash prfofile? It's the only variable I can think of.