I just noticed tonight that there is slime in my ATO container... I have a 5 gallon tank in the stand of my Oceanic 29 gallon biocube that I use as my ATO reservoir. Anyways, tonight while doing a WC and topping off my container I had to dig my hand into it to reconnect my hose running from the pump to my tank. When I pulled my hand out it was super slimy as well as my pump... The container doesn't have a lid on it but the stand is decently sealed off. What can I do to prevent this from happening? I'm using RO/DI water with 0 TDS after the DI and if it would help, I could use a 5 gallon water container next to the tank instead of the 5 gallon tank below. Thanks!