Whats the NPK on you bloom bottle OP.
Excess pk will do what you see. (which it looks like to me)
So will a low ph in your soil. (which it looks like to me)
So will over watered, damp soggy soil. (how good is your drainage and aeration?)
What is your watering routine?
How many times in a week are you watering?
How much runoff are you getting each time.
Very important to tell the thread your npk%
Any supplements?
What is the ph, and ppm of your water source?
Take a soil sample, and test your ph with a soil kit. First and foremost.
Next watering, give it a great big drink of plain water. Until you have plenty of runoff.
Then dry it right out.
Then big drink of plain water again.
Once it dries again, id give it a light balanced feeding.
You're out of balance.
I dont think some microbes will hurt.
I dont think some nitrogen will hurt either.
But give it a drink of plain water first.
Then dry it right out.
There are different types of nitrogen.
For instance Ammonium (a form of nitrogen) makes your ph fall. Wet soil generally has higher levels of ammonium.
Excess pk locks out calcium, magnesium, iron, potassium, zinc, and a few others.
The problem here is.
If your soil is high in PK, and low in Nitrates. Your soil will likely have a low ph, and be high in Ammonium (urea) instead of other Nitrates.
PK becomes really quite unavailable below a ph of about 6.
So if your soil has a low ph, more ammonium, and high levels of PK, then you're basically gonna lockout on almost every nutrient there is.
The more drainage and aeration you have the better. It needs to dry so the ph can rise. Also to decrease ammonium, and increase PK absorption. Because the extra PK in a low ph, damp soil is whats causing your issues imho.
In my opinion moving forward.
Plain water. Flush it a little.
Dry it right out.
Plain water again.
Dry it right out again.
By which time it should be a lot greener.
Then start a light feeding of a balanced fertilizer, until its recovered.
Work your plants on a wet/dry cycle. So the ph swings, and isnt always low.
It needs a good rinse, and dry. Plus a different NPK ratio.
Dont water too often.
Dont feed too much.
Always have plenty of aeration and drainage.
Good luck OP.
Ps.
Ph'ing your water has almost no effect on soil ph.
You can test this yourself.
Get a soil test kit, and some distilled water. Take 2 samples of the same soil (say a soil with a ph of 6).
Mix up two different batches of distilled water. One with a ph7, and one at ph5.
Then use each on their own sample.
Then come back 30 minutes later, and test the two samples. I guarantee each sample will be extremely close to one another.
Its the soil that affects your ph, not H2O.
Its what the water contains, that can affect your soils PH.
Plain unadjusted water is perfectly fine for soil.
Also what ph down are you using?
Because a lot contain phosphoric acid (from phosphorus)
Some contain citric acid (contained in citrus)
My point is. All youre doing is adding acid to an acidic soil.