dear pondmarket like to order the laguna aeration kit pt-1630 but i would like to know if the air pump is okey left out in freezing temps in winter most air pumps ive read cannot be left out in open below 0 temperatures.
The PT-1630 can be left outside and the temperature is not really a problem.
It does need to be shielded from snow and ice.
Laguna makes a cover that looks like a rock, just for that sort of purpose.
It can be found here:
The smallest one will do the job for the Aeration kit.