I have been doing a coulpe of grows with what seems to be an awesome mix of soil. I use ffof, happy frog and promix plus my perlite and a touch of vermiculite. I add marine cuisine mixed with all pupose ff dry mix. I then add dolomite lime and azomite. I have grown side by side grows and the results are crazy. I use organic nutes; neptunes harvest sw and fish, big bloom healthy plant molases and another mineral clay called excelerite. This seems to work well and actually keep my ph down to 6.0 to 6.3. They love it and grow huge. Six auto blueberries 2.35 lbs dry. One 222gram beast. Thanks dutch passion. The others are a current grow were supposed to be +speed by sweet seeds done in 50 days but instead turned into some pretty nice plants. I grow under a raptor dual hood with 1000hps and a 1000mh with two lumatek dim digital ballasts.