is this nutrient burn?

[Rail]

Hi everyone! I just started growing indoors after lurking for a long while and I have a small problem with one of my plants. I looked in the sick plant post and nute burn looks like the closest thing to what I've got. The problem started about a day or so after I transplanted them from a 100% FF Ocean Forest mix to the current one listed below.

They are in FF Ocean Forest 50%, 30% Smith + Hawken all natural potting soil, 20% perlite. Supplemented with 2 tsp. bone/blood meal and 1 tsp. dolomite lime per pot.
I am watering every day and feeding every third watering.
Nutes are 2 Tbsp/gal FF Big Bloom and 3 tsp/gal FF Grow Big. I stepped up the nutes when I transplanted from 2 tsp/gal of Grow Big, the Big bloom stayed the same.
Temps are 65~68 F night and 71~77 F day.
I don't have a ppm/ec/tds tester, I am using General Hydroponics pH test indicator liquid. pH of the water coming into the pots is ~6-7 and is the same in the runoff.
They are under 6 4' 6500k T5 floros which are 3-4" away from the plants.
They are 23 days old from seed.

This is what I am seeing today:

I have already stopped feeding it and have run water thru it for 3 days now, but it still looks too light green to me.
What makes it more confusing is that I have two other types in the same box getting the same nutes and water. Also that the problem is only in the new growth, the older leaves look OK to me. The others seem to be doing well don't show the problems of the white widow. Indoor is much more sensitive than outdoor. I have never run into this problem with my outdoor plants, usually they are all dark green and bushy (like the mazar and c99xhaze).

Here it is nest to a mazar freebee:
And next to the c99xhaze:


What do you all think? Can I fix this just by keeping the pH between 6 and 7 with plain water for a few more days/week?
Thank you for looking!

 

[HeadyPete]

Hi Rail,
I think you are on the right track and understand the problem well. Blood/bone meal is strong stuff usually, I don't see how big the pots are, but that combined with some heavy feeding (and the FFOF has nutes in it) and lighting that would fall midway in the range of light intensity (HPS being the top of the range and regular flouro/cfls at the bottom). The plants that are taking the strong nutes look good and the overnute ones are minor. Why are you feeding so much bloom at this point? Back the liquid nute dose off 50% per feeding and they will all be good.

It's important to keep the ph as close to 6.3 - 6.5 as possible, and keep it stable for best results.

 

[Rail]

Hey Heady, thanks for responding! I was worried that i have never posted before that my post would be ignored. I am glad to know that I am on the right track, I felt a little unsure of problem and needed a second opinion. I will hold back more nutes on the other plants as well, they might be getting close to the same thing. To answer your questions:

I am using 7L pots, nothing too large. I figured the bone and blood meal was was heavy duty stuff because the packaging lists 1 pound of it per 100 sq ft. My hope was that I didn't overdo it and it looks like I didn't by too much.

Also the Big Bloom is a bit of a misnomer - it seems that the FF Tiger bloom is the heavy duty bloom fertilizer. The Big Bloom is .01-.3-.7 whereas the tiger bloom is 2-8-4 and is made up of an organic soup of worm and bat poop. I looked at the dosage on the side and it was 4x or more of the tiger. Seems like alot less strength to me so they should call it something else to be clear hehe.

I hope your garden goes well , thanks for taking the time!

 

[Phelps]

I will recomend u get a TDS meter, they are so cheap on ebay, and will save u from guessing at proper nute levels. Under floros, u should be shooting for 800 ppm as soon as u establish a healthy rootzone, i f u have HID lighting u can feed stronger because the plant will use the extra light to turn the nutes into energy, thus tollerating a higher tds. That is why u found out that indoor grows are much more touchy to nutes than under the sun. All in all the plants look good!

 

[HeadyPete]

I see about the FF....I never used it.

Bloodmeal is around 11-0-0 and bonemeal is around 2-13-0, so big potency for those macro nutes.

A transplant into bigger pots, if possible, would help big time. Just soil and perlite, no extras there is still plenty in the soil now.

Gardening can be very confusing until you put in some time and sort out all the info.....