root rot

[wilson 6006]

hi my last 2 grows have been ended short due to root rot. I'm running a rdwc setup with a chiller., last time I put 4lt of household bleach in 160lts of water ran for 3hrs soaked for 2hrs before flushing with fresh melbourne tap water., and introduced the chiller to the system. The res temp sits under 20deg. when running. The last run It didn't happen until 4weeks into flower. I monitored the roots regularly as i was a bit weary. new system different lights to normal. ( heaps of circulation, heaps of bubblers )They were white and healthy up to a week ago. I use the professors grow roots as recommended . I was considering also using oxyplus in the future. Could the rot be coming in with the tap water? how can i fix that? I have a rainwater tank which I could use, but havent as I figured melbourne water was ok, and I was more likely to introduce fungal problems using tank water.  Is there any thing I can use to sterilize the tank water? I water form the top of the root ball, I have always done this with no problems, yet some recommend not to. should I use a different sterilization method ?  any suggestions or advice would be appreciated. wilson

Edited October 14, 2019 by wilson 6006

[Tunkers]

How much light gets to the root zone? If temps are in order I'm not sure other then that

[wilson 6006]

How much light gets to the root zone? If temps are in order I'm not sure other then that

no light that I know of reaches the root zone. thanks

[wilson 6006]

i posted this on several forums , I was advised to lower the level of the nutrients to 50mm below the netpots , which I have hopefully this will help

[ooodog]

Have you used CYCO Zyme? It’s about $65 for 1lt but I’ve never had healthier roots in my plants since I started adding it.

 

 

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[GreatSouthernMan]

are you using any organic based hydro nutes by any chance ? I like to add a small scoop (qtr tspoon) per 20L of Great white mycorrhizae atleast weekly