Just a thought,... my deltec in-sump skimmer has 2 air-tubes running down to the pumps. when first powering it up, I have to blow into them to get the pumps "primed" and start airflow going. i dont have a UPS yet to keep the skimmer going in the event of a power-cut (it would have to be quite a high VA = expensive) as a workaround, would there be any problem hooking up a cheap air-pump to the skimmer intakes to have it sort of "self-prime" when power comes back on? would the air-pump "pushing" air (as opposed to the skimmer pumps sucking the air) cause issues?