Indoor Hope's perpetual Skyline grow

[hope2grow]

Didn't want to leave the EC at that and go to work as there'll be another flood while im out.. so I've pumped out 5L and put in 5L of tap water.. its brought EC down to 1.2 again.. its all I could think of to drop EC quickly! Gonna have to check this every few hours til I can figure it out.

My initial 1.7 read was from the tray.. the res read 1.5 before I added the tap water.. just to get the numbers str8. The res had still gone up overnight.

 

[DDubs]

It could be because when any extra feed evaporates from your tray it leaves the salt residue behind and by adding another flood it washes those salts through to your res. The beauty of the rockwool is you can just flush the medium with proper water and just keep watering till your numbers come down in the medium.

 

[Zaaboot]

Temps were over 30 all night.. am I losing water to evaporation and thats leaving a higher concentration of salts behind maybe??

hello mate - that will be the salt build up on the cubes, use the res water to top feed to wash through, then change the res again - you may have to do it twice but with 1.7, that is not dangerously high

 

[Zaaboot]

Didn't want to leave the EC at that and go to work as there'll be another flood while im out.. so I've pumped out 5L and put in 5L of tap water.. its brought EC down to 1.2 again

thats should be fine, it will come back high again but dont worry about until you get home and wash the cubes through from the top to make sure you get rid of any build up. And yes on the water evaporation leaving higher res numbers - you will get the knack of it pretty quickly

 

[hope2grow]

A flat tray has arrived in the post today.. glory be to DPD

 

[420autoflower]

Set my new res last night at 1.2EC.. 2 floods later and its at 1.7!!! Wtf.. @Zaaboot @420autoflower any idea why my EC woild have risen so sharply after 12 hours/2 floods from a new res?? I'm baffled!

100% normal buddy. Your plants are at the stage where they are going to be drinking more than they’re taking in nutes, so you will have to bring down your ec by adding RO water or water with a lower ppm to bring down your ec. You should be checking your ec and ph at least once a day, then make adjustments if needed.

 

[Mara Cachafa]

The pH of the 15-gallon res for my coco grow was creeping up so I had to add more pH-lower before every feeding (every 12 hours). I solved the problem by only adjusting pH for enough for one feeding at a time (2 or 3 gallons). I guess that's not an option with automated feeding systems like yours.

@Mañ'O'Green said that the different components of the nutes react together and cause the pH to change and may cause some solids to precipitate out of solution. That's whey they say only mix enough for a few days or a week max.

I hope you figure something out, pH lower ain't cheap.

***EDIT*** Oops, so blitzed on the purple kush oil in my cocoa this morning that i forgot the topic was EC, not pH. Sorry!

 

[hope2grow]

The pH of the 15-gallon res for my coco grow was creeping up so I had to add more pH-lower before every feeding (every 12 hours). I solved the problem by only adjusting pH for enough for one feeding at a time (2 or 3 gallons). I guess that's not an option with automated feeding systems like yours.

@Mañ'O'Green said that the different components of the nutes react together and cause the pH to change and may cause some solids to precipitate out of solution. That's whey they say only mix enough for a few days or a week max.

I hope you figure something out, pH lower ain't cheap.

***EDIT*** Oops, so blitzed on the purple kush oil in my cocoa this morning that i forgot the topic was EC, not pH. Sorry!

No problem my friend.. valuable info none the less.. smoke on.. or cocoa on.. as is the case

 

[420autoflower]

100% normal buddy. Your plants are at the stage where they are going to be drinking more than they’re taking in nutes, so you will have to bring down your ec by adding RO water or water with a lower ppm to bring down your ec. You should be checking your ec and ph at least once a day, then make adjustments if needed.

These girls are sitting on 3.5 gallon reservoirs and at their stage of growth the reservoirs will spike from 1.6ec to over 2.0ec after just a couple feedings, they are drinking over 2 gallons during a 24 hour period so I’m having to top off and adjust a couple times a day. During veg and early flower (stretch period) your ec will stay steady because your plants need more nutes but when they reach mid flower to harvest time you will have to bring down your ppm with fresh water when it rises.

 

[420autoflower]

These girls are sitting on 3.5 gallon reservoirs and at their stage of growth the reservoirs will spike from 1.6ec to over 2.0ec after just a couple feedings, they are drinking over 2 gallons during a 24 hour period so I’m having to top off and adjust a couple times a day. During veg and early flower (stretch period) your ec will stay steady because your plants need more nutes but when they reach mid flower to harvest time you will have to bring down your ppm with fresh water when it rises.