what ph for my grow medium?

hello all. i recently started a new grow using a medium i havent used before. so im wondering what should i be phing my nutrient solution to when using a 60-40 sunshine mix / perlite? im thinking i should be feeding a hydro solution but im not sure.
my last couple grows were done with a 75/25 mix of bx promix and perlite. I phed for a soil grow and it was fine, although i did run into a few defficiencys. But i believe that was from under feeding.
thanks in advance
 
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