My 1st Go Growing!

Bit of an up and down week this one. I only ph'd the water week one once at the beginning. This week I had the feeling the calibration was all over on my meter as the leaves started curling and twisting on both plants and I thought I may have been at least plus or minus 1.0 on my feed. Bought a new one which I think is a lot more accurate with 3 points if calibration (although it only calibrates at two of the liquids it does read the 3rd correctly). This has meant a battle raising and lowering the pH occured feed by by feed and as I only bought pH down for our hard water I had to improvise with baking soda to bring it back up. All in all I think this has caused the problems with the leaves but I'm open to any thoughts anyone has! The Strawberry Banana is definitely the bigger of the two, already wondering if the Gorilla Cookies will catch up or stay small and if this has been down to me!? I've been giving 200ml each daily with root boost and grow from biobizz.