Haven't heard of TaNG? You must be new he's a master. Go to DutchPassion sub forums here he's in the top there, or mephisto he's all over there too. That being said his tap water is good pH and he uses advanced nutes which are pH perfect, so no he doesn't pH. I'm not speaking for him, but he probably gets 200 notifications or more a day so it's impossible for him to keep up and reply everywhere. I've already picked his brain and he offered his feed on the forums here where he explains in better detail.