Blowout - Yes, that is a blower for the spa. It goes up on the pipe next to it with the cap. This picture was taken before everything was completed.
The 30 gallon Stenner tank is nice. When I bought it, it was on sale for the same price as a 15 gallon tank. That tank is a beast and is huge. It's great because I don't have to bend over when I add bleach or worry about splashing. I usually only keep about 7 gallons in at a time. The other thing is that the pump is 22 gallon/day capacity, so my run time is shorter. About 13 minutes to raise FC up 1 ppm for my pool.