.1) Type and wattage of lights. First 40 days was 1000w Sunmaster Cool Delux MH. Just switched to my Eye Hortilux 1000w HPS 3 days ago. .2) Distance from tops? 31" atm .3) Reflector type? 6" Magnum xxxl .4) Is there a consistent fresh air supply? yes .5) Do you have an exhaust fan and a circulation fan? yes .6) What are the bulb wattages, kelvin ratings, and schedule? 18/6 don't have kelvins atm. Your medium: .7) Hydroton and rapid rooters. .8) Size of container: 5 gal buckets .9) Rapid Rooters Your nutrients and water: 10) Source of water? RO What's it's ph before adjusting? 6.0 11) Method of checking water ph. - Bluelab Combo meter. 12) Method of adjusting water ph. GH UP/DOWN 13) Specific brand and N-P-K ratio for each bottle. List dosages GH Flora Micro and BLoom. Have been gradually adding. Current mix is 6ml Micro and 12 ML Bloom. About 1.2 ec. 14) How often are you watering between feedings, and how much per watering? I have been changing the res out once a week. 15) Any additives or tea's? Epsom salts last night..... 16) Are your ph levels stable, or do they fluctuate? For a while they would climb .2-.3 then remain stable. Lately (in the last week) they have been falling. 17) What is your ingoing water's ph? 5.7 18) Do you foliar feed? No. Your growroom: 19) Indoors or outdoors? Indoors 20) What size of closet, room or hut? 4x4 21) What are the temps and humidity levels while lights are on? ...With lights off? 75-80F RH 30-40% Lights on. 67-75 RH 35-60% Lights out. 22) Have you seen signs of insects in the growroom? No. Your strain: 23) What strain are you growing? Feminized White Widow. Green house seeds. 24) From seeds or clones? Seeds. 25) Is this an autoflower strain? No. Problem: For a couple weeks I was noticing some yellow blotching in between veins on older growth. I didnt think much of it because there wasnt much and at the time I thought it could be from too much wind/friction on the leaves. I set the fan to low and it ocilates now so Im sure thats not it. A couple weeks later I noticed some rust spots on the lower leafs. Again I wasnt that worried about it... I had been gradually increasing my nutes and the next feeding I saw no spread of the problem... In the past 2 weeks the plant has exploded in growth. I upped the nutes 3 days ago to what I mentioned in the form. Last night I saw that the rust spots had spread and were showing on some of the upper fan leafs. My system is about 13 gallons recirculating through 3 buckets and a polar bear chiller. Res temps highs are in th 70 and lowest has been like 64. Last night I added a total of 10 teaspoons epsom salts (desolved into 1 gallon RO.) I added 1/2 gallon of the salt mix to my res (it was about a gallon low anyway). Waited 30 min for the solution to mix and added the rest. This brought my EC to 1.6. My ph was at 5.5 and had been falling the past few days at about .1 per day so I added 4 ml PH up which brought the system to 5.7. Additional info. I changed the res 3 days ago and set the ph to 5.8. Last night it was 5.5. The entire grow my ph has been on a steady rise (start at 5.6 land at 5.8-6.0) until recently it started to fall. This morning I checked on the plants and they are starting to droop... I'm thinking I may have added too much salt and screwed my res. My plan is tonight to drain the res and flush for a couple hours with tap (ec 0.4) then add a fresh mix of 8 ml micro and 16 ml bloom and maybe 1/4 teaspon per gallon disolved epsom salts. Does it sound like I am doing the right thing? Should I wait another day? Any info would be great =/