Leaves curling up on edges, drooping and black spots

Hey all. I recently switched to 6" rockwool from coco in previous grows. i had been using tap water corrected to 6.3 ph. the serrated edges of the fan leaves started to curl up and over. i called the hydro shop and they told me to use RO water and suggested i might be over watering.

i let the rockwool dry out and get nice and light then watered with RO water corrected to 6.3 ph and 1000 ppm combined botanicare pro grow, Cal Mag and liquid karma.

the leaves are still curling and now some of the leaves are getting these circular black spots. also the plants droop towards the end of their 18 hour light cycle. what could it be?

Your Equipment:
.1) Type and wattage of lights - HPS
.2) Distance from tops? - 18-24"
.3) Reflector type - enclosed reflector
.4) Is there a consistent fresh air supply? - no (in a closet)
.5) Do you have an exhaust fan and a circulation fan? circulation only
.6) What are the bulb wattages, kelvin ratings, and schedule?- 600w, unknown, 16-8

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...) - 6" rockwool
.8) Size of container.-n/a
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? - no

Your nutrients and water:
10) Source of water?filtered) What's it's ph before adjusting? - 7.5
11) Method of checking water ph. ph pen
12) Method of adjusting water ph. PH Up
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. - Botanicare pro grow 3-2-4 adjusted to 1000ppm Botanicare CAL MAG 2-0-0 5ml/gal
14) How often are you watering between feedings, and how much per watering? - i feed every watering, flood and drain method
15) Any additives or tea's? CalMag
16) Are your ph levels stable, or do they fluctuate? - unknown
17) What is your ingoing water's ph? ...your runoff ph? - ingoing 6.3
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? - no

Your growroom:
19) Indoors or outdoors? - in
20) What size of closet, room or hut? - closet 5' x 3'
21) What are the temps and humidity levels while lights are on? ...With lights off? - 40-50% humidity, 85 degrees lights on, lights off unknown humidity, 70-80 degrees
22) Have you seen signs of insects in the growroom? - no

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) - both
24) From seeds or clones? - clones
25) Is this an autoflower strain? - unknown

Your Equipment:
.1) Type and wattage of lights - HPS
.2) Distance from tops? - 18-24"
.3) Reflector type - enclosed reflector
.4) Is there a consistent fresh air supply? - no (in a closet)
.5) Do you have an exhaust fan and a circulation fan? circulation only
.6) What are the bulb wattages, kelvin ratings, and schedule?- 600w, unknown, 16-8

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...) - 6" rockwool cubes
.8) Size of container.-n/a
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? - no

Your nutrients and water:
10) Source of water?filtered) What's it's ph before adjusting? - 7.5
11) Method of checking water ph. ph pen
12) Method of adjusting water ph. PH Up
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. - Botanicare pro grow 3-2-4 adjusted to 1000ppm Botanicare CAL MAG 2-0-0 5ml/gal
14) How often are you watering between feedings, and how much per watering? - i feed every watering, flood and drain method
15) Any additives or tea's? CalMag
16) Are your ph levels stable, or do they fluctuate? - unknown
17) What is your ingoing water's ph? ...your runoff ph? - ingoing 6.3
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? - no

Your growroom:
19) Indoors or outdoors? - in
20) What size of closet, room or hut? - closet 5' x 3'
21) What are the temps and humidity levels while lights are on? ...With lights off? - 40-50% humidity, 85 degrees lights on, lights off unknown humidity, 70-80 degrees
22) Have you seen signs of insects in the growroom? - no

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) - both
24) From seeds or clones? - clones
25) Is this an autoflower strain? - unknown

i'm having trouble figuring out how to edit. if a moderator could delete the troubleshooting form, i need to redo it on the right form.

Yeah generally if the leaves are curling up its overwatering, if they're curling down its underwatering.
How often are you flooding?

every few days, or until the rockwool gets nice and light. i'm pretty sure i'm not overwatering

I'm not a hydro grower but my understanding is the plants need to be watered more often than that in hydro. The roots need to stay moist, if they dry out too much between waterings they'll die.
Maybe someone with more hydro experience will post.

when my girls wake up tonight im going to put them into soil. just rockwool isnt working out for me

I believe its your ph... ingoing ph for hydro should be 5.5ish.

however, if you do switch to soil the ph should be about 6.5.

I don't think there drooping they like to lean towards light