Any suggestions?

[Steelwool]

I just went 12/12 3 days ago when I noticed some yellow patches on some of the lower fan leaves and the upper/newer leaves seem to be a little skinnier. They all also seem to curve down a bit. It's not getting worse but it's not getting better. (See pics) Should I change the nutrients? Any suggestions?

[4x5]

I donno, what are you giving them now? can you check ph of your soil and runoff? Nice looking plant otherwise.

[stinkyattic]

Looks like the start of a micronute def... leaves shown in detail pic are shoing a Mg def... flush that plant out completely and start feeding your bloom nute.
Personally I would also add a micro supplement to the first feeding. I've been using the micro part from the GH 3-part as a quick fix for that sor tof thing.

[TheGreenFog]

^Yep...maybe even some Cal-mag? :)

The Fog :rastasmoke:

[Steelwool]

I checked the PH and it's @ 7.8. From what I'm reading that might be the problem. I have "PH Down" (sodium Bisulphate) for my hot tub. Can I use it to lower the PH in the water & Nutes mix I'm giving them? I'm using ferti-lome 23-18-16 for my bloom Nute. Is thet too much Nitro?

[stinkyattic]

steel,
i'm not sure how the hot tub pH adjuster would be.
i suggest using cider vinegar until you can get to the grow shop, or find out whether the one you have is okay.
7.8 is certainly quite high.
As for your nute, that ratio is appropriate for veg, but i would use it at a much lower concentration.
For bloom, you REALLY want to cut the N way down to less than 50% of what you had been using for veg... bloom nutes typically have an N value of only 1-3.

[Zandor]

I checked the PH and it's @ 7.8. From what I'm reading that might be the problem. I have "PH Down" (sodium Bisulphate) for my hot tub. Can I use it to lower the PH in the water & Nutes mix I'm giving them? I'm using ferti-lome 23-18-16 for my bloom Nute. Is thet too much Nitro?

NO NO No

You need food grade products only.