Need help with plants in VEG ... Curled tips with lime colored leaves ... PLEASE HELP

Ok, so im about 6 weeks in and Im supposed to go into flower tuesday with most of my plants. Ive been using Botanicare nuts including Karma, Blend Veg and CalMg. I am doing a drip system on a flow table through hydroton as my medium. PH is at 5.8-6.2 everyday and max temp in the room is 84 low of 60. PPM is at 1100 roughly and my plants are acting up. I think its because I went by the directions on the back of the bottle and not my buddy Stinkbuddies. I used 15 gallons of water with 25 tbps of karma and blend pro both and 15 tbsp of CalMg. It said 2 tbsp's of each karma and blend pro for mature veg plants per gallon. Also, karma said 1 tbsp per gallon. My plants are on a 1 on 4 off timer drip system so they arent being over watered. The problem I have is that some of the new growth is a lite green color and my tips are slightly burnt with curled tips. Also, theses plants are in rock woll in the hydroton because we bought them as clones. Just trying to figure out if I should ride it out for 4 days or flush now until they go to flower and start fresh. Any ideas would be great! Lighting cycle is 18 on 6 off and is 20" above the medium plant. Some plants also are getting very mild crispy tips and a couple of yellow leaves. Please help! Thanks.

Im thinking K deficiency ... potassium?
 

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