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Sweet. Things about to go in flower in a week so I'll need to pick up whatever you're adding!

Aero guys use sub pumps all the time. If you are worried about it, stick it in the tub and flush with some bleach or clearex (or the like), then flush with water.

Damn, does this mean I have to get rid of my entire system?

http://www.growweedeasy.com/marijuana-symptoms Given that leaf turning down, I'd guess Signs of Nitrogen Toxicity Dark green leaves and foliage Leaf tips may turn down, without signs of overwatering. You may notice yellowing on the affected leaves or other signs of nutrient deficiencies as...

ok, I think I figured out what they didn't like. Right around this time I started shaking my nutes before mixing things up. Why? Cause I was reading the back of one for some reason and it said to. Fast forward to the next round and I was having the same problem during veg then it hit me...

Ok, but what are you using for a level switch? What I'd like is when the smaller res inside gets to a certain level, it turns on the pump to the outside res.

I'm trying to find a pump I can use to pump from a reservoir inside my tent to one outside. Temps inside are way to high so I want to drain to one res and when the level gets to a point, pump to one outside. Basically a sump pump but would rather have something smaller than what I'm finding...

Thanks! I figured as much but this is my first run so thought I'd better ask.

Is going up by 150-200. This due to the plants just drinking water and not taking up the nutes or?

Well, I was talking a few hrs not a couple days or something that my PH dropped. That said, these leaves are still turning and my PH has been fine for a week.

Guess, I'll just let it be

So, should I add some cal-mag or what?

Here's a few pics. Most the plants don't look like this. Seems like 2 or 3 (out of 9) at this point and it's also not the entire plant.

my water is about 160ppm from the tap. I've been following SS1's nute recipe and so ya know, this is on a aeroponics rail system.

Just started 6th week in flower and I've semi scrod's em. If they weren't under a screen, I'd guess 25-30" or so I was having issue with the PH creeping up over 6.1 but it seemed to have stabilized over the last couple weeks and I have checked that daily.

That's what I'm trying to find out! I posted some pics last weekend on SS1's thread and you can see things were great then! https://www.rollitup.org/t/my-3-stages-of-flower.533650/page-111

Tap water(which I've been using since the start) and PPM were about 1200 this AM. I'll get some pics later of some other plants. This just started in the last couple days too.

Would a low PH like in the 4 range for a short time do this? Changed my res Sunday and PH was fine initially but then found it way low later that day. That said it's been around 6.0 since Sunday and these leaves just started to show yesterday