Yes, 6.6 is too high for hydro. You want to stay between 5.8 and 6.2. If your using gen hydro stuff check out latewoods recipe in the hydro section. Gives you a all the ppm and ph info you will need during veg and flower.
fireman25 Reviewed by fireman25 on . Mn deficiency? Pics Hi guys, I've taken some pictures (poor quality) of my plants today. The HPS made it look like I'm peeking through blinds in the one pic. :wtf: As you can see, the leaf that I removed has blackish brown tips and little spots on it. As it started yellowing, I removed it. There are quite a few leaves with these spots on them but they aren't yellow. Do you think it could be a Mn deficiency? My setup is as follows: 400w HPS lots of air Hempy buckets with 100% perlite GHE Flora Series Rating: 5