sick plants I need help

Hello,
ok first off I copied the aeroflo design. First I used 3" pvc pipe. Now I have switched my tube type from 3" PVC to a 4" vinyl square tube they sell from home depot. I can't seem to get my plants stable.They yellow and some have root rot Slow growth. Does anyone have experience with the Vinyl?
Does anyone know if it is virgin plastic?

The 4" square tube in the picture is what I am using? That's not my set up just an example

Thanks in advance for the help

what are your water temps?

I have 10 different reservoirs so the temps range from 70-80 degrees.

That's why you're getting root rot. Keep your temps below 70 and make sure there is no light getting to your water. Wrap all your tubes and your res in aluminum tape.

ok I have been looking into water chillers. Do you know of any water chillers for multiple reservoirs? Whats the max temp I can have?

I'm not sure, I have a single res unit with a DIY chiller.

If your looking for an easy way to cool your water, you could just get an old junk yard radiator,put a fan on it, and hook it up to your water loop. Dont spend a rediculous amount of money on a water chiller , when this will do the same job

SuperChopped said:

If your looking for an easy way to cool your water, you could just get an old junk yard radiator,put a fan on it, and hook it up to your water loop. Dont spend a rediculous amount of money on a water chiller , when this will do the same job

Click to expand...

The problem with that is that radiators have copper tubing that some would argue fucks with your nutes and PH. I use a cooler with a bunch of tubing coiled inside. A pump in my res pumps the water through the coiled tube in the cooler back into the res. I just keep the cooler filled with frozen 2 liters and my temps stay in the low 60's.