I need to replace the coolant in my LC chambers so what type do I use ?
Triethylene glycol with 30% glycerin or Ethylene glycol with 30% glycerin or should I not even add glycerin to the mix ?

It's ethylene glycol 70 30. but you should just buy it from mcm.
glycol (http://www.mcminone.com/product.asp?catalog%5Fname=MCMProducts&product%5Fid=20%2D4275)

There is also this post ...

http://archive2.avsforum.com/avs-vb/showthread.php?t=545976&highlight=glycol+absorb

Tom, I get my glycol from Clarke electronics by the gallon and it comes already premixed.

Give them a call at: 1-800-541-3341

John

Thanks John !
Tom