I've never used BioBizz, so I don't know their dilutions...but they look like either they are a tad starved, or they were starved.
If it started after the transplant, I'd make a little adjustment. Either I'd increase the nutrient dosage a little tiny bit, or soak the media a bit more when giving nutes. If it started before the transplant, I'd give it a few days to see if there is any improvement in her growth.

Often, old leaves are old news, and there's nothing that can be done to improve the appearance of a necrotic leaf. Work on keeping the new growth happy. :thumbsup:

You mention the runoff at 6.7 but didn't mention the tap ph. Also...does the tapwater smell like chlorine, and do you use a micronute additive or Superthrive?

20 inches is a bit far for a 600w bulb, isn't it? Can you get it closer without burning the ladies?

Perlite and vermiculite are basically benign, (harmless) unless it dries-out the soil too quickly.
Rusty Trichome Reviewed by Rusty Trichome on . please help my babies! heres my stats if you could help me id be very grateful the bottom leaves of most of my plants began turning yellow ive posted some pics, sorry about the quality, i think the problem is probably due to i used soil bought from my garden centre and just added vermiculite and perlite, could something be locking out nutrients from the feed? i have flushed them and then repotted into larger pots, they were slightly root bound but not enough to cause these problems in my opinion . since repotting Rating: 5