Pythium / root rot rx in coliseum

[Half Baked]

I've been battling this thing for a few cycles with limited success. Going drain to waste in straight perlite with chemically based nutrients (GH flora micro and bloom) .

Disease spreads relatively quickly within the first couple of weeks of plants being introduced into the system.

Tried bennies and various organic water treatment products (aquashield etc.) with no effect.

suggestions greatly appreciated

[c-ray]

temps?

[Half Baked]

rez and room temps: 65 - 75

run a tank (55 Gallons) 10% bleach solution followed by another of 10ml /gal H2O2 through between cycles

always add dutchmaster zone at 2ml/gal (cloramine?) to every nute solution

and for my next trick, gonna try increasing dissolved oxygen with an air stone

[plantbuilder]

fuck

[HATCH]

Another Thing, Are You Running Your Pump At Light's Off ?? If Yes, I Would Stop, Just Water When Lights Are On, And Let The Roots Air Out Light's Off.

[Half Baked]

ok at the risk of boring everyone here is the routine i use prior to the start of each cycle:

1. run through 100 gals of 10% bleach solution ph'd @6
2. run through 50 gals of 35% H2O2 10ml/gal ph'd @6
3. run through 100 gals of plain water ph'd @6 as a rinse
4. run through 50 gals of nutrient solution prior to planting babies ph'd @ 5.8 containing 2ml/gal of zone as an antiseptic. I then monitor runoff to be sure ppm and ph are within appropriate range
5. transplant babies into coli


feeding schedule:

as previously stated i'm opting for the antiseptic/chemical style of growing as opposed to the organic / beneficial bacteria etc. type . Using Lucas ratios of GH flora micro and bloom at 950ppm or ec=2 with 2ml/gal of zone.

1. for the first 7 days I feed 8gals once per day when lights first come on
2. day 8 i run through 20 gals of nutes to flush system and get 20% runoff
3. for the next 7 days I bump up the feed program to 10gals each day

this repeats until harvest time.
runoff is around 1100ppm with ph around 6.3 throughout cycle

The reason i lightly feed each day is to try to avoid the upper row plants being shorter than the bottom row. I figure if the upper row gets a small squirt of nutes every day, it will equalize the conditions between upper and lower rows.


PB it's an honnor to have you tuning in. Not sure i got what you were driving at with: "please consider the relationship between localized (high) ec and pythium"

thx for everyone's input

[c-ray]

colloidal silver?

colloidal silver and h2o2?

how to make colloidal silver

[nuggdigger]

pythium starts early..but conditions make it prevail..
good practice is using damp off when taking clones..
some water treatment methods like heating, UV, ozonation or even chlorination can help keep it at bay...

Quote:

Pythium Aphanidermatum and Pythium Irregulare can cause the most damage in ebb and flow systems. This is because the organisms form a swimming spore stage that can move in water and attack your plants very quickly.

it moves in the water..this is why daily top row watering in not a good thing for you.
i recommend watering every third day, and covering the holes to keep it from drying out as fast up there.

also you already know that its worse at a higher ec..and the ppm in the media vary according to the drying cycles.

finally your coli is dtw..are all the stages before the same?...and what is your cloning media..jiffy?
hope this helps..http://www.crophouse.co.nz/files/CG_...thium-view.pdf

peace

[Half Baked]

c-ray: never heard of colloidal silver, will give it a closer look

nuggz: thx for all the great tips, currently trying chlorination at 2ppm.
will adopt your suggested watering schedule
i clone in rapid rooters and veg in perlite inside 9ozs plastic beer cups on tables
clones go in very healthy
not sure what you mean when you ask are all the stages before the same? but if you refer to the veging stage, that's done in tables, ebb n flow, recirculating nutes.