Need some feedback on possible causes and solutions to my 75g tank.
The tank is already established. Before this the tank had really
clear water. Filter is clean as well or as clean as I guess a
canister filter can get.

Anyway, the tank is heavily planted with compressed CO2, and 7cc of
TMG dosed daily and ~210w of cf. Anyway, just the past week the water
has had this milky color to it. The plants are still doing great with
no adverse affects that I can tell and the regular 50% weekly water
changes is only clearing it up temporarily. About 24-26 hrs after the
water change, its back to being milky. No adverse affects on the fish
that is noticeable.

Anyone have any ideas of the cause and a really low cost solution.

thanks