FallChinook
Member
We use Instant Ocean and RO/DI water that we mix up in a 45 gallon trash bin (new and rinsed). We have a Koralia 3 and 4 in there constantly mixing the water and a heater set at 78F. I am noticing a thin light brown film that feels chalky on the surface of the bin. There is a heavier coating on the pumps, heater, and power supply lines that are submerged. Any ideas????