Dear Customer,
The brown hue seems like the microbial because of the warm surroundings.
We advise you to drain the water and clean the tubes or distro plate with a soft bristle brush. And then use our Pellucid coolant which effectively prevents the growth of fungi. Here are the links to the video of draining water and the parts on our ****** shop. If you have any questions, feel free to contact us.
https://www.youtube.com/watch?v=K7ecpBJ93rg
https://usa.bitspower.com/shop/index.php?route=product/product&product_id=7443&search=500M
https://usa.bitspower.com/shop/index.php?route=product/product&product_id=8127&search=500M
https://usa.bitspower.com/shop/index.php?route=product/product&product_id=7951&search=soc
https://usa.bitspower.com/shop/index.php?route=product/product&product_id=8047&search=DLDR
