Advice please ?

Soil is a organic mixture with very low npk,250w hps, only used tiger bloom one time and was at 1/4 strength. The girls are a few weeks into flower bag seed, and I've ran into an issue they are drooping badly and getting discolor in a few fan leaves near the bottom. Here's a few pics!! Sorry if I left anything out

IMO- Magnesium deficiency.
Cal/Mag 5ml. Gallon 2-3 doses, and then 1 dose per month at 5ml. gallon until finish.
Give it to all your plants once a month as a preventative measure.

I'm with topfuel... looks like mag def at least.

What's your pH, and what is your watering cycle (perhaps over/under water for the drooping).

Pics of the full plant(s) would really help here.

-spek

Get an inexpensive soil NPK test kit $13 on ebay. Takes the guess work out of the macros.

Will update pics tonight, watered them last night, ph pen says 6.6 ph and I've calabrated it also. They look a lot better I'm thinking it might have been underwatering, I water them every 3-4 days depending on how dry the soil is.

Def CalMag. Just add 1/2 recommended dose your next water

It looks to me like it has been sitting for too long in over moist soil leaving the plant with little air to breath in via its roots during the respiration cycle plants go through when lights are out. With no o2 being able to be uptaken by roots, the carbohydrates break down into alcohol rather than breaking down into co2, h2o and energy.

It is important that the media you use can retain moisture, but also allow roots to breath. It is also just as important that you water thoroughly and let root areas dry out before watering again, work with your plants, watch their cycles, how long it takes them to drink the pot media dry.

Over watering, and moisture sitting too long around root areas will stress the plants and can also lead to nutrient deficiencies even though you are feeding them, the roots just do not uptake the nutrients, in fact, the reverse can happen with the reverse osmosis that takes place in roots and nutrients can leach out of plants along with moisture....even when you are feeding them. The common factor is over watering and/or media that does not allow for air to exist in the root area.