do not be dumb (like i am) and put the water pump inside the water tank, even if the its put in inside the water wehn used in aquariums. The pump gets quite hot after a while and that will add a lot of unwanted heat to the water.
keep the pump outside and use both of its inlets/outlets.
whew, that saved me bout 5 celsius
keep the pump outside and use both of its inlets/outlets.
whew, that saved me bout 5 celsius
