Toxicity/bleaching?--slow stunted flowering

[Muskellunge218]

possibly.
but you have to look at it like this. it needs to be between 6.8-7 ishhh personally when I grow in soil ill use it, at 7.2 from my water and only adjust if I notice any issue coming. but most growers wont they will ph there water from day one. some plants can cope better with ph fluctuation than others. but you have already done the low ph-ed water, also some will say flush it with ph-ed water strait away but your soil will buffer it so it may well be ph 6-6.2 in the pot now depending what your run off was before.
so skipping up to 6.7-6.8 when it neeeeds water again wont be such a huge jump. you may get signs you may not if you notice any drastic changes over the next 2-3 days then flush with ph-ed water no nutes. also ph in the run off is not always that accurate.
just keep a eye on her, and adjust next time, you should get away with it hopefully. I'm sure other people will give you advice , best thing to do is wait a day and see what others say. and take the best from all the posts

but personally I would wait until next water to readjust the ph.

and make sure you raise those lights. I got my 250w led 18inches above the canopy. they will stop growing when they get to the point that they feel like they dont need to go up as the lights to strong. that's why they slowed growing.

make sure you post a picture of them here when there fat and ready for the chop be nice to see, as they look good now..

Thanks brother for the scoop. Will do when they hit the chopping block. They are just over the 30 day mark. Although, may I ask, just so I know for the future, we suspect the curling of inner/young leaves was due to heat/light stress?

 

[Muskellunge218]

Ps: light has been adjusted to 23"

 

[din5]

Yes I would say light stress . You'll soon know . As she looks in good shape otherwise.

 

[Waira]

Musky- sorry dude, got the flu last week,... Anyway, as I mentioned before, HF soil is a mild one, but acidic pH's have been an issue with soils these days,... you're okay there, luckily! The pH for soil is best around 6.4, so taking your at face value, it could come down a bit; your feeds are acidic, so test them first and see what you read,...if they're in the low 6's, feed away, or adjust if needed,... have I cautioned you about the run-off method? It's an iffy way to test, lots of measurement error potential; here's an improved methodology https://www.autoflower.org/threads/...-for-run-off-testing-and-ph-estimation.41733/
...best to get a soil pH probe, like an Accurate 8 ... nothing beats direct in-soil measurements! All that said, you're not having a pH issue here, it looks from the new pics like your feeds got a bit hot, or built up...that type of curling looks like N-toxicity; back off the Grow Big and just use the Tiger and Big bloom...what can happen is if the temps are high, and RH low, strong breezes, any or all can combine to cause localized heat/wtaer stress on the plant... this shuts down transpiration, as the plant fights to retain water, and when that happens, the flow of water/nute's from roots up slows way down,...meanwhile, nute's start to pile up in the soil, and can cause toxicity symptoms, and lock-out type defc, symptoms,... are you using a Ca-Mg supplement? I see signs of early Ca and Mg defc. starting on the lowers,... start getting Ca-mg in there, and the lights you've raised already, right.? What are the T and RH in there now?