Last summer I drained my Bullfrog R6 using only a sump pump, intending to simply clean and refill. Because of unforeseen circumstances, I didn't get around to refilling the spa for a month or more (maybe two?). When I started to refill, I realized the mistake I'd made. There was extensive algae growth in the hidden water that remained in the low spots of the plumbing. I had to refill and drain several times to rid the spa of that foul water.
This year, because of (1) the realization that I take no pleasure in using the spa when it's 93+ degrees outside and (2) an extensive upcoming travel schedule, I want to drain the spa and leave it empty for the next two or three months.
I just drained it using the sump pump while simultaneously using the built in gravity drain connection. With the Jetpaks removed, I can see there is still standing water in the internal plumbing.
How to I go about getting as much of the water out of the plumbing as possible? I don't want to find that I've created a new ecosystem when it comes time to refill.
Thanks.