[hydro2]

blankSteve, on 06 April 2012 - 04:31 PM, said:

Oi mate,

Steve, I love the way you start off your posts.


@JBlaze What does your tap water Ph at fella?

H2

[Leprechan Sweet Leaf]

Do you have drainage in those paper cups? The compost does look a bit on the damp side.

[iky]

best way is do a comprrison grow in the same space using different soil and water combinations to find a reason for your problem..to me it looks like nute lock out PH or cold will do this.
the only other thing that will kill like that is overfertilization,,I would think you as a seasoned grower will have known about overfeeding/done it a few times myself..
I also had something similar with a too rich compost(was only one bag), best of mate hope you sort it ok

[Floyd]

lazi, on 06 April 2012 - 04:30 PM, said:

There is nothing about RO water that 'needs fixing'.

It need's the same "fixing" that soft water needs "fixing".

Water is classed at soft if the ppm is below 125.
RO water's ppm will be close to, if not 0.

When growing organic and not PH'n, water this pure/soft has little if any buffering ability and if you relay on the soil/compost to buffer your non-ph'd water/feed it wont.

Also the lack of CalMg can lead to both deficiency's, along with other lock-out issues from
unstable PH.

When growing with hydro, you still need to supplement RO water for the lack of CalMg but
the PH issues will not occur as the reservoir will be PH'd.

Similar story with non-organic nutes, you'd be PH'n your water, but lack of CalMg can be a problem.

Some folk never get issues due to what else they put into there water when feeding.
Some products contain enough CalMg & trace elements etc... that a deficiency doesn't occur.


GreenFloyd

[komodod]

GreenFloyd, on 06 April 2012 - 01:33 PM, said:

7.5ml per gallon seems alot mate, I use sensiCal Mg and the stated does for the
grow one is 1.25ml per ltr and I find 1ml per ltr to be plenty.

I wouldn't say its a fungus.

ive had cal mag issues exactly like that, id say thats what it is but i dont rate ro water i think it can cause more issues than tap water sometimes

[jblaze]

I do not use a ozone generator.

PH of RO Water is 5.6

PH of RO Water and nutrient 6.2

I was dosing the Sensi Cal/Mag Grow at the same level as the Bloom which is 2/ml per liter. You are right Floyd, it should be given at 1.25/ml per liter. Would an excess of cal/mag create on off ph environment, in effect making the nutrients unavailable?

Regardless, I have moved from the home I was growing in and have started to water my veg plants with the new home well water, and the plants have seemed to turn the other way a bit. I will attach pictures first chance I get

This post has been edited by jblaze: 07 April 2012 - 01:11 AM

[komodod]

glad to hear you have sorted it. definately something to do with calcium or magnesium tho. i have issues sometimes because of growing in coco. i always have to add it to their feed.

[Floyd]

Hey man, how's your girls doing now?

[lazi]

GreenFloyd, on 06 April 2012 - 06:46 PM, said:

lazi, on 06 April 2012 - 04:30 PM, said:

There is nothing about RO water that 'needs fixing'.

It need's the same "fixing" that soft water needs "fixing".

Water is classed at soft if the ppm is below 125.
RO water's ppm will be close to, if not 0.

When growing organic and not PH'n, water this pure/soft has little if any buffering ability and if you relay on the soil/compost to buffer your non-ph'd water/feed it wont.

Also the lack of CalMg can lead to both deficiency's, along with other lock-out issues from
unstable PH.

When growing with hydro, you still need to supplement RO water for the lack of CalMg but
the PH issues will not occur as the reservoir will be PH'd.

Similar story with non-organic nutes, you'd be PH'n your water, but lack of CalMg can be a problem.

Some folk never get issues due to what else they put into there water when feeding.
Some products contain enough CalMg & trace elements etc... that a deficiency doesn't occur.


GreenFloyd

In other words, the nutes need fixing but RO water gets the blame.


I use RO water and all I put into it is GH micro and bloom plus Liquid Silicon as pH up. There is a float valve on my RO bucket, so for every mix I squirt in the 3 liquids then tip the RO bucket into the feed bucket. Haven't needed to check ec or pH in years.