Rockwool PH fluctuations

Hi guys long time reader first time poster, done a few years worth of outdoors now Rollin into soil less..
I've got most down pat. I have 8 plants in a 1m2 tent temp stays at a constant 22c and humidity at 45% using canna nutes and addatives..
Now rust spots have just started on lowers made the usual mistakes and recognized. have overfed and overwatered now backed off plants are looking better but the rust is still building..did a runoff test and got 5.5 in 6.8 out .. Now ...couple of questions ..
I notice when I adjust pH that something precipitates out of the solution.. Could it be my buffers are not diluted enough ?
Or is it linked to overwatering or the overfert.. Annoying the hell out of me..

BTW strains are lemon og, gorilla cookies, gg4 x ww peyote cookies and pineapple express.. Any opinions or advice appreciated.. Cheers from oz

You say soilless and mention rockwool. It stops there. Are you in hydro? If so RWDC? E&F tables? DWC?

Pictures are a must. Your basic description covers possible burn, deficiency or bacterial/fungal issues.

Rockwool is the choice because it's inert.

Lights are off I'll post pics tomorrow in the meantime Im running drain to waste two drippers 6 inch cubes.. .. I only bought the humidity meter today just to make sure it wasn't the % . brand new tent brand new everything soaked the cubes and shit I've used grodan before.
The only thing Different I'm really doing from last time is I'm using drippers.. Am I simply not running enough solution through it?
There not in a bad way ..YET
I've gone through the basics of it all a hundred times.
Rockwool pH is at 6.8 if I pour the cube out on an angle. Could it be the plant doing it or am I tripping. Not getting any algae or anything either BTW. Thanks for replying dude

I would be wildly guessing myself but others may have experienced this same problem . Hang in and post pics.

May have solved the problem . I was only feeding once every two days sometimes once a day just to see the reaction. Doing some research there u go.

Underwatering. Lol
Still trying to dial this bitch in

Pictures would really help OP. We already know you're growing .

Some food for thought. I would keep the Feed Water at 5.5-5.8PH. PPM is important, but much more so with smaller plants.

Over/Under Watering is one of the tricker things when starting in hydro. You don't want the cube soaking, but never let it dry out.

When you are adjusting your PH, you said:

Rekless1 said:

I notice when I adjust pH that something precipitates out of the solution.. Could it be my buffers are not diluted enough ?

Click to expand...

Does the water get Cloudy? Make sure you mix your nutrients in the correct order, and try Diluting your PH up/down BEFORE you add it to your nutrient mixture.

Hey man
Nah the water doesn't get cloudy bro just when it hits it . probably just the impact.
Got the nutes down they are flying alone starting to see sixth node now about 3 weeks old.
Think I've sorted it. Flushed double there volume and its fallen to around 6.5 flushed again its at 6.2 now.
I will just feed every morning now. Could be just me but they automatically look happier even if they've just been drenched. The greens a lot more fluro less dark
?

I'll post some pics up today.
Excited for these strains .

PS. Definetly diluted the buffers.
Not that amateur lol been growing a lot of outdoor seasons now grown everything from sensis ruderalis to sensis Jamaican pearl the first autos when they came out blueberry outdoors..
Had a partner I was growing with years ago we did a sog ebb and flow reservas sour kush purple wreck ak48 and sensi star if I remember. .
That sour kush definetly opened my eyes to the potency.
5 years later at it again just for the perso of course.after all the bullshit I never wana part with it haha.