Quote Originally Posted by razzapiggy
Perhaps it's time to invest in a ph stick...
They're like less than $25 at the hydro shop, and it would be the most valuable use of your money in your entire set up.

If you have 4 weeks to go there may be little or nothing you can do about the yellowing. It is completely normal in many varieties for yellowing to start about this time in your grow.
Opie Yutts Reviewed by Opie Yutts on . Magnesium Difficency? What ya think? It's not really effecting alot of the plants, but the leaves that are effected are in the middle of the plant, not at the top which has me a bit confused. I have recently added a bunch of fans so I thought the few that were effected was possibly wind burn, but a few more have shown up with a few odd signs... Had a friend say it looked like mold, I personally don't think that's the case at all. Using SuperNatural Bloom pH 5.7-6.0 Medium SunShine#4 Rating: 5