Cereal Milk Auto by CKS First Grow

Just starting week 5 will keep updating as I go been having a couple issues lately with some of the top fan leaves, they've been starting to get a couple brown spots on 3-4 of the fan leaves not sure what the problem is yet if anyone has any suggestions let me know. Update: Just ordered in a new ph meter from Apera I'm pretty sure my cheap $15 dollar ph meter was all sorts of messed up. UPDATE: ec going in .7 runoff ec .86, ph going in 5.7 runoff ph 6.6 I'll see if the ph goes down now that I have the new ph meter my old one was definitely off. UPDATE: Got the EC down to .4 gonna start slowly introducing nutrients back in, also got the medium pH down to 6.1 from 6.6. Finishing up week 5 think I've gotten things under control now just need to get my EC back up now showing a couple signs up deficiencies on some leaves but nothing too bad, I'm thinking Week 6 will start flower. Did a Flush this Week now looking back on it I shouldn't have done that that caused my plant to go into a deficiency, what I should've done was not flush with half strength nutes I should've used normal strength nutes but just lower the ph more that was the real problem.