Rdwc beginner issues. Any help is majorly appreciated :)

jordan5star

jordan5star

Well-Known Member
How do we do guys

right il start with my set up. 20 litre 6 pot rdwc with 120litre reservoir. In a 1.2x2.4m tent under 2 600wt lights.

i dont use RO water i use tap water. Ec is 0.5 and ph is 6.5 before any nutrient is added.

My issue is PH and EC

i can get to the perfect ph area of 5.5-6.2 when my nutrients are added. But the only issue is my EC keeps rising past 1.6. I cant seem to get it low without affecting the PH ( i lower ec and ph rises back to 6.5)

can someone tell me if im doing something wrong or? This is my first time doing rdwc im a coco sort of person but got sick of lugging sacks of coco around.

look forward to the responses guys :D
 
jordan5star

jordan5star

Well-Known Member
Im debating it, its just the cost of the system and chiller and then an RO on top was stressing my wallet slightly. If i was to purchas an RO would that solve my probleMs?
 
Failmore

Failmore

Well-Known Member
Tap water is fine and is not the problem. Your tap water is p hard tho at .5ec. But yes ro is better.

I use tap in my flood drain.

Your nutes and your ph have a direct relation to each other. More nutes lower ph. Less nutes higher ph.

How big are the plants?

1.6 ec is ok if the plants are big.

What nutes are you using?


If you want lower ec mix less nutes and use more ph down.
 
Failmore

Failmore

Well-Known Member
After I do a res change and ph my water it raises up after the first day. I ph it back down and then it is some what stable around 6. You want it to wander around a lil.
 
jordan5star

jordan5star

Well-Known Member
Hi bud

there only babies, 2 week old cuts, roots starting to come out. I use shogun samurai hydro grow a and b designed for hard water
 
jordan5star

jordan5star

Well-Known Member
Its weird i have been using ph down and up but they seem to also raise my ec when used. I used some ph down earlier. Got 5.8ph but ec then rose to 1.8
 
Failmore

Failmore

Well-Known Member
So use about half the nutes you used and slowly increase.

My tap is .33 ec. Ph 7.8. Total ec for small plants was .5-.7.

After they got some leaves bump it up to 1.5 total.

I'm in week 1 flower or so and my ec is 2.0 - 2.2 total...to be clear that is hi. But I see no burn. Some lower leaves yellowed so I'm pushing it higher.
 
Failmore

Failmore

Well-Known Member
jordan5star said:
Its weird i have been using ph down and up but they seem to also raise my ec when used. I used some ph down earlier. Got 5.8ph but ec then rose to 1.8
Click to expand...
Ph down adds to the ec. How much do you use? I have the advanced nutrients ph down and it is strong as fuck. 4ml for 10 gallons.
 
jordan5star

jordan5star

Well-Known Member
I literally used like 1.5ml of each A & B . But if use 0.5ml of each base feed do i then use PH down to get to correct ph and will that keep the EC stable? Sorry to sound like a tool
 
Failmore

Failmore

Well-Known Member
jordan5star said:
I literally used like 1.5ml of each A & B . But if use 0.5ml of each base feed do i then use PH down to get to correct ph and will that keep the EC stable? Sorry to sound like a tool
Click to expand...
That little got you to 1.8 ec in 120litres? Or is that 1.5 per liter?

And yes. Use as much ph down as needed to get between 5.5 and 6.

Ec will fluctuate a little. Just try to keep it in a range. If it goes up add water. Goes down add nutes and water.
 
jordan5star

jordan5star

Well-Known Member
Failmore said:
That little got you to 1.8 ec in 120litres? Or is that 1.5 per liter?

And yes. Use as much ph down as needed to get between 5.5 and 6.

Ec will fluctuate a little. Just try to keep it in a range. If it goes up add water. Goes down add nutes and water.
Click to expand...
yes mate 1.5ml per litre

im going to drain the system and start again. Adding 0.5ml per litre of a&b and see where that brings me
 
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