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New growth should be very white.... many many many chemical and organic nutes in hydro will stain roots yellow or brownish....

Plant use water faster then they use nutrients... so less water... but more or less same nute level... equals ppm going up. If you worry about salts buildup... or have a problem with sprayers clogging n all that... run plain phed water for 24 hours or a weekend.. it'll flush things out well.

EXACTLY!! easy! Stoney is right about the precise mixing... either mix in the jugs like he says... or if mixing in a rez... make sure your pumps are all turned off so u get proper readings on ph/ec and everything gets mixed evenly.

Too much ozone concentration in a room can kill you... not just be slightly toxic. Came with co2 use.

5 gallon DWC setup... I cut mine back all the time.. 24/0 lighting...

7 days is always safe... (i'm in a moist basement with a dehumidifier running too) after that bag or jar em... and cure until your hearts content.

The water can't really get too cold usually..... the room temp typically keeps it up... it should be cool.. but not cold... i'd look up the actual perfect temp.. (think it is round 70-75) but i'm lazy rite now.

my dehumidifier is used to keep my basement from growing mould... if i didn't have it run my walls would be an infestation.

Pound the light to em... let em grow!

My leaves do not ever droop, unless i'm at the end of flowering and they are yellowing bad.

And carboload.. or liquid lead.. or all of those... the 'secret ingredient' is blackstrap molasses... it is just already broken down and diluted.

100% safe to use! It is distilled water.

I'm gonna go with no.... rotten meat is still rotten meat after cooked.... you can extract the thc with iso... then evaporate.. then cook with it.

lower light the better.... light degrades thc... if you can't shade it i wouldn't worry about it... better to have it dry then rot/mould.

A hygrometer reads the humidity in the air.... i'm just checking that the temp you say is a temp? and not a hygro reading?

More to more then less... depends on your amount of lighting... you'll get to a point where it'll slow down... but yes... a 2 foot plant will yield more then a 1 foot.. and so on and so on... until light won't penetrate the canopy.

I dont see nething showing yet... however the pics are quite small.... You'll see the signs when they show up... impossible to miss!!

An airstone isn't needed in an active ebb and flow system... if you are constanty churning the water with flood cycles on n off then it doesn't matter... I do mostly aero/drip/nft... that kinda stuff... 24 hour constant cycles... ALL of those are constantly churning the water.. and i've not had...

Could be shocked.... I've had the same exact problem with armageddon last month. I had roots coming out of the oasis (rockwool) cubes.. so i put them in the 5" cubes a put the big lights to em... only for nothing to happen the whole entire week..... however... 3 weeks later they are well over...

It is impossible to overwater a plant in hydro.... IF the water is well aerated. If the water sits stale between cycles I could see a problem.... you have an air pump and air stones in your res? if not... $5 at walmart. LECA (hydroton) does hold a lot of water/nutes... but not to any extent...