Looking for advice on rigid acrylic rebuild

[GTXJackBauer]

What liquids and biocides did you use in your loop?

 

[MunkyTOS]

i had xspc ec6 coolant (no dye) and deadwater biocide. the algae build up i assume was just from lack of maintenance. I meant to keep up with it but had planned to redo my loop because my current loop lacked the ability to drain and then it kind of got put on the back burner because of $$$.

After i dismantled the loop i noticed the tubing had built up a thin green film.