My story

I know I got problems with my nutes. I just can't seem to get a handle on it. I have read "The Complete Guide to Sick Plants" problem is I see alittle of my plants problems in all of the discriptions!! If I mix my nutes at 3/4 strength I wind up with a ppm of 980 - 1120. I realize I need to flush with just water. Do I continue feeding at 3/4 or do I feed less? If I do feed less, isen't that kinda like creating a deficiency? Anyway, as you can see, I need guidence.

Below is my information

indoor growing
The size of the grow room 7' x 7' x 8'
hydroponic
4x4 Rockwool cube
Fill & Drain My resevoir is 10 gal.
Feeding cycle 7 times a day for 5 minutes. I have been allowing the water to fill up 2 to 3 inches of the rockwool cube.
Concerns I have are I might be watering to far up the rockwool and that I may be over watering. If that's possiable with rockwool.
The top of the rockwool is somewhat soggy now.

Water Machine outside market The water I get at the store shows a Ph of roughly 5.8 - 5.9

I use liquid drops and a color bar for my Ph. I try to keep it in the Yellow (Ph 6.0)

The 2 bigger plants are about 2 months old The others are mabe a month old. From seeds.
I use Tecnaflora plant prod. Their so called Recipe for success. I do not totally follow their recipe. I have been using 1/2 to 3/4 strength


600 w High Pressure Sodium aprox. 3 - 31/2 feet from top of plant. The light cycle is 24 hrs on during veg.

Try to keep the room temp. between 78 -84 deg.
My nutrient temp is around 78 -80 deg
Max Temp 90.5 Humidity 32%
Min Temp 80.5 Humidity 23%

I use an in the wall air conditioner and an ossolating fan. Door is usually closed with as hot as it has been. Las Vegas is stupid HOT!!!

try lowering your ph 5.5 - 5.8 is optimum IMO

You MUST increase your air exchange rate, or add CO2.
Lower pH to the range given by GG.
You are quite leikely overwatering; 7 cycles/day rockwool flood/drain sounds excessive to me. You really would like you medium to get fairly dry between flood cycles. Why did you choose RW for flood/drain? Taht medium is IMHO FAR better suited to a drip system.
Your fertilizer solution could likely use a boost since you are not using it close to the rec. dosage.
Heat spikes into the 90s aren't good.
And depending upon the actual number/size of your plants, you may need a larger res.

Most folks who E&F in RW will cycle only once or twice a day- sometimes only once every other day. Your RW is not draining anywhere near fully.

I only flood hydroton 5 times a day( every 3 hours while lights on, once while they're off).