Nub DWC PH keeps going up

[weeping angel]

Have you tried letting the water sit for a day or two or putting a bubbler in it to really pump some air through it before using it?

[ringusworm]

I have 20 litres sitting outside

No i only have the one air pump , I'll put the little pump from the res in the bucket now.

Would the PH then stabilise after the rise.?

I have had issues in the past with a fish tank where to much aeration raised the PH, problem solved with the addition of driftwood.

Which is no help here.

[ringusworm]

Learning curve.

Tap water is stable, 5.8 this morning 6.0 tonight.

PPM stable, brown sludge gone.

I thought spring water was the good oil for my babies.

Too much of a good thing.

Thank jebus.

[ringusworm]

Also moved the air stone motor as it was adjacent to the light , sucking in 24c air into the res.

[Sir PsychoHashy]

Never done DWC, but hydro is hydro, and root rot is root rot.  Brown slimy roots is likely your problem, root rot can make PH skyrocket almost uncontrollably, and once in your system it's almost impossible to get rid of, best you can hope for is some degree of control.  Personally, if it was me with plants at that early stage, and if it is root rot, I'd bin them, and either thoroughly clean and sterilise the whole hydro system, or preferably bin it and replace it completely.

 

1st, make sure that's the problem is, which it sounds like it is.  2nd, try to find the cause and eliminate it.  Without seeing your complete setup it's only guesswork, but looks like you've got white buckets, you want black, or at least cover them with something to completely block light from getting into your nutrients, make sure hoses etc are also blacked out.  Res temps are also important, I think it was Ozzy that said 21ish, which is about right, but you certainly don't want it over 22, and lower temps do increase oxygen levels, but too low and it inhibits plant performance.  Some root pics would help with getting advice.  Best of luck

[ringusworm]

I will post some photos soon, thanks Sir pycho.

The DWC is actually black, i have just painted the lid to try and improve the reflective surface.

The algae was just about covered the res, flushed everything with warm water and bleach.

Rinsed and sun dried.

Gave the roots a 15 minute drown in H2o2.

I have removed all but two plants , the bag seed is doing the best so i left it in plus a skunk#1.

Res is staying clean now just using tap water, light into the res and heat managed better now.

Res temp is under 21c.

Other 3 are out in the sun in coca coir.

Hedging my bets.

[ringusworm]

Ah well , slime and PH rise is back.

Dumped the lot, starting again with new seeds and soil mix.