Ok. I've just gone over the diary for the weeks they've been in flower and I can see why you thought you had a nitrogen issue. Maybe you did, maybe you didn't... clawing like that can also be the result of under- or over-watering... and since you say you haven't quite figured out fabric pots yet, that makes the cause even cloudier!
Here's what I'm going to suggest... I would just give them pH'd water each time they are dry and need something for the next TWO times (see my answer to your other question about this - I explained how I water fabric pots). If it is a continuation of a nitrogen problem, this should clear it up without having to do a full flush again... and then the third time, add in your bloom nutes and maybe 1/2 dose of the Bio Grow (the Bio Heaven is only making the roots more able to access nutrients and gobble more of them up so you need to be giving them SOMETHING to eat...). Now, you might see that they're perking back up long before you get to this last step - in which case, you'll know the problem had been under-watering and you can simply resume your feeding as normal.
Does that make sense??
The only other thing I'll bring up is that, as I'm sure you know, plants in flower don't need a whole lot of nitrogen - and both the Bio Grow and especially the Top Max has a lot of it.... I would be cutting these nutes down, particularly the Top Max (can you see I'm a little hard on ONE nute?! LOL!) ... but too much nitrogen can cause other nutrients to be locked out such as calcium and then you're going to be back to flushing again... So just beware of that.
Good luck - I really don't think you've got a HUGE problem here - and I think you'll do just fine!