Hi everyone. Looks like we're in for a cold week here in the north east. I was thinking of putting Dow foam directly in my tote tank on the water to try and prevent heat loss of the water. I already have two inch Dow under the the tank and spray foam insulation approx. 1.5" thick around the sides of the tank. I have my 300 watt aquarium heater and my air stone in their o I don't think a lack of o…