Slimy ATO and RO water ??

[tang daddy]

It's best to always keep the ato resivoir away from light and have a lid, do you remember me suggesting that you also add an air wand for oxygenation. This also acts as a skimmer bubbling debri and other scum to the surface and eventually adheres it to the side of the tank. This way you could wipe the residue off the glass with a clean napkin or cloth....

I hope what I am saying registers if not let me know and I can clarify in more detail!