Plants looks sad

Hi all need some advice. First time growing in dwc. Grow info ad follows. 4x4 tent HLG550 V3 rspec dimmed lowest setting. Ac keeps temps at 73-77. 4 in exhaust. Th around 55, nutes GH FLORA. I have 2 blueberry muffin in a single 27 gallon tote 4 air stones. I have given them 20 mls of GH 3 part and 20 mls cal mag ph 5.8.
Everything was looking great until I changed the water in the res. I used same strength nutes.
Pic are before and after red changed any idea would be appreciated.

One other thing I switched my 400 watt mh last Saturday

Sing to it.

Hey, it can't hurt.

Yeah I tried that!!! The wife didn’t like it to much!! But thanks for the advice

supernew413 said:

I have 2 blueberry muffin in a single 27 gallon tote 4 air stones. I have given them 20 mls of GH 3 part and 20 mls cal mag ph 5.8.

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So we have 27 gallons of water and when you measured in the Micro, Grow and Bloom you did 20ml of each one? Is the water RO water? What is your PPM?

The fact your plant looked fine before may be because it was still living on it's seed reserves that are now exhausted.

Here is the numbers on your 27 gallons of h2o with 20/20/20/20 ml feed. (Weak sauce)

So ppm is at 360. The tote is 27 gallons but it’s about 18 gallons of water

Is it RO water?

These #'s are adjusted for 18 gallons, still very weak sauce.

No i use tap water. I did declorinate for 24 hours.

What PPM is the tap water by itself?

Good to know u think I should bump it up!!

Yeah tap water here is 105. I didn’t think about that. So my nutes are like 250

supernew413 said:

Good to know u think I should bump it up!!

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Get up around 700 PPM at least. I take my rooted clones directly to 1000 PPM.

Make sure that your pH meter is calibrated, if you start to see a "stripey" burn pattern develop then the pH is usually the cause. It can get worse even after the pH problem has been corrected but it won't spread to new growth.

Thanks for the advise. I will bump it up. Also I think the hlg 550 was to much for these plants. I actually put my 400 MH. Back in the tent and they have perked up

Really 700-1000 these barely have roots they are from seed. Appreciate u though first time growing in dwc. Iam a soil guy trying something new

I subscribe to less is more when were talking about adding loads of snake oil to your res.. but I'm 100% with Renfro on PPM's of base nutrient... Provided your ratios aren't crazy so you end up locking out certain elements (this is what happens when you add all the extra crap the hydro shops want you to buy) then high ppm's aren't an issue. Boiled down it's really this simple. If your ppm rises, the plan is using more water than nutes, so tone it down a bit, and vice versa. 1000ppm isn't high. 2000 is high.. but they'll still take it.

Just do an experiment. Take whatever nutes you are using, and mix a batch at whatever strength it tells you to on the bottle.. i'd bet my grandmother that it comes in well over 1000. We rarely ever do what it says on the bottle by the way, but I'm just using that as an example.