PPM and Ph keep going up..

[vender]

Hello my PPM keeps rising until about 850 - 900 PPM. Is this normal and how can I lower it?

Ph keeps going up to 6.5. I adjust it every morning to 5.7. Is this normal?

By now I would think the Hydroton and Rockwool have no effect. I am using water from my dehumidifier with 22 PPM and 5.9 Ph.

 

[DiscoBiscuit]

pH down (and pH up) will increase ppm. make sure solution is completely dissolved before adding. what are you using for pH down?

 

[HeadyPete]

Hydroton will not affect but RW certainly will. Rockwool is made from spun basalt rock (like cotton candy) and the 2 major components of basalt are calcium and magnesium. They are both alkaline and also buffer ph, which makes it harder to lower. Eventually they will dissolve out of the rockwool and cease to be a factor.

How do the plants look, overall? Uniform dark green or blotchy and spotty?

PPMs will rise as water evaporates from your rez, so topping with your plain water would lower ppms.

PPMS will lower as plants eat up the food. A good indicator to the status of your plants.

If you want more info from peeps then please fill out this info form:

HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on?
Are you growing in a PVC grow tent? (example: Hydrohut or any other non brand tents)
What system are you running? (DWC? Ebb flow? Aero? Water Farm? Flood Tables? and so on...)
What STRAIN are you growing?
What was the establishing technique? (Were the seed or clone?)
What is the age of your plants?
How long have they been in there mixture they are in now?(coco,soiless etc..)
How tall are the plants?
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in?
What Technique are you using?
What substrate/medium are you using?(Hydroton, RockWool etc.)
What is the Water temperature?
What color are your roots? White? Brown? Are your roots slimy?
What Nutrient's are you using?(If growing soiless)
How much of each nutrient are you using with how much water? *Knowing the brand is very helpful*
How often are you feeding? (If using soiless)
How often are you giving nutrients? (If using soiless)
If flowering, when did you switch over to using Bloom nutrients?
What order are you mixing your nutrients? (example: veg nutes 1st, bloom 2nd ect)
What is the TDS/EC/PPM you are using?
What is the pH of the "Tank"?
Are you sure your calibration is correct on your equiptment?
When was your last watering?
What is your water temps?
When was your last feeding change? (ie. grow-bloom-micro-additional)
How often do you clean your system: example: Flush out water replace with clean water and nutrients?
What size bulb are you using?
What is the distance to the canopy?
What is your RH Factor(Relative Humidity)?
What is the canopy temperature?
What is the Day/Night Temp? (Include flucutaion range)
What is the current Air Flow? (cfm etc.)
Tell us about your ventilation, intake exhaust and when its running and not running ?
Is the fan blowing directly at plants?
Is your water HARD or SOFT?
What water are you using? Reverse Osmosis (RO)? Tap? Bottled? Well water? Distilled? Mineral Water?
Are you using water from a water softener?
Has plant been recently pruned, cloned off of or pinched
Have any pest chemicals been used? If so, What and When?
Are plant's infected with pest's

 

[vender]

I am using General Hydroponics Ph Down. The solution is mixed with a bubble and a pump running 24/7. I have noticed the ph down increases the PPM by only 29 PPM.

 

[vender]

Plants look great. I just have to keep up on the pH. Some plants have nute burn so I have been just adding water to the tank. So that makes sense the water evaps the pH goes up. Thanks for the info.