Need some advice

This is my first grow I am 3 days into my 3rd week of growing, I am using DWC a double outlet air pump a six inch bouble stone in each, in a closet 3ftX5ft, two plants each in a 5gallon bucket with net pot built into the lid, a fan blowing. I am using Flora Nova, I am usign 3 gallons of water per bucket with 1tsp of nutes in each bucket, water out of the faucet ppm is 0.30 after I add the nutes it goes to 0.70, I am using 4 T5 bulbs 4ft long, I use the color scale with drops to test my ph, which is at 6.0, I started using Sure2Grow cubes, surounded in hydroton which was rinsed out befor being used. The strain is unknown.

My leaves are turning yellow I believe it might be a lack of calcium, which I am going to go buy some Cal-Mag. The pics are of both plants.

What does any one think, and if I am right how much do I use. I an not a veteran so if I am wrong please steer me in the right direction.

Thanks.

Might want to wait till a hydro guy offers assistance, as my opinions are just that...opinions. I'm a soil grower, but I tried unsuccessfully to use the Flora Nova series a couple of years back. (I got it from a 50% off sale) Had problems with keeping ph in line, and all that potassium in the nutrients wasn't helping. (most sources of potassium raises ph) Went back to Fox Farms after one grow cycle, and used the Flora Nova on my houseplants. I guess if forced, I could have figured-out the perfect dilution rates and ammendments to pull it off, but I'm used to FF, so learned my lesson, and went back to what I liked.

But just looking at the plants and your situation it looks to this inexperienced hydro guy like ph issues, and possible nutrient lockout beginning. (weirding-out new growth, yellowing of leaves, starting to get the 'claw') Running hydro, it's a really good idea to get a quality ph pen and some calibration solution. At least till you get to know your water, nutrients and plants. Might be from a watering schedule problem, but not sure.

Do you ph the water before adding nutrients, or after? The color-coded test results are skewed by any tinting of the water, so your ph number might be off a bit...and isn't 6.0 ph a tad high for a hydro set-up anyway?

Unless you are using reverse osmosis water, it's a tad early for needing calcium. When the time comes, you might want to consider using molasses (unsulphered) instead of the CalMag. Molasses has calcium, magnesium, iron, carbs and a host of micronutrients. IMHO, a far better choice than the CalMag.

Anyway...don't make any drastic changes till you get a solid answer from a hydro guru.

Looks to me like they are being underfed possibly..... ?

Up your CF to 1.1 from 0.7 and keep your ph at about 5.6-5.8 and you should be good to go. You have lots of growth so it will need feeding.

Always ph after you have added your nutients.

I always start mine off like this and they are usually fine.... ?

Again you guys came through, I love this forum. I increased my nutes and my plants are doing fine.

You are most welcome :)