Sludge on my roots!

relativeood

Well-Known Member
My set up is in an 18 gallon rubbermaid. I have 4 gallons of solution in the bottom being pumped through a 1/2 inch tube with misters. The misters mist the 4 inch rock wool and the roots hanging in the air.

I also have 2, 12 inch air stones pumping air into the solution that the roots are now hanging down into.

My problem is that the roots that are in the water are covered in a brown slime! The 2 bottom sets of fan leaves on both plants are heavily rusted (which has happened slowly since I've been growing them). I initially thought that the rusting leaves were because we had to wait 2 weeks to get our buffer solution to calibrate our PH meter and were having problems telling what the PH was with those test strips.


I am using fox farms nutes, flushed and cleaned the reservoir 2 days ago, and am back on 1/4 strength nutes.

So what do I need to do? I know that my reservoir temperatures were in the high seventies and that these are too high, but recently have been in the low seventies

Should i remove the water pump that is creating extra heat, and just convert to a full deep water culture setup?


By the way, the plants (out side of the bottom 2 sets of leaves) are doing EXTREMELY well. They are 21 days out from being put into the rock wool as seeds and are 7 inches tall and 14 inches wide with over 10 sets of leaves each.


Thanks in advance!

PS. Im using a 250 watt horitux blue MH bulb thats about 12 inches from the plants, and the ambient temp is 78F.
 
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