Ahhsome is good, it really works for cleaning out the biogunk and will help minimize chemical usage.
You do not need any other "miracle" chemicals. PH up and PH down and shock. A good test kit. Taylor K2006 is the one I use. The Frog test strips are good for a quick check but can be hard to read and are imprecise. You may need to increase hardness or Alkalinity but test that first. Get your TA to 120-150, then adjust the ph to between 7.2-7.8 and set the @ease system to the setting recommended for the size of the tub. I do get a little foam for a day or 2 after shocking it, maybe defoamer would help but after a couple of days, it's gone. I really don't want to keep adding crap to the water.
My tub has the inline @ease system and it's doing a fine job so far although it's only been 2 weeks. I initially set mine to 2 with a TA of 125 and a ph of 7.6. The chlorine ppm after 2 weeks was between 2 and 3, so I reset my cartridge to 1 to get it to the recommended level for the Frog system to .5-1ppm and will check it a bit later. I also shock once a week right now. We use our tub roughly 30 minutes 5 nights out of 7.
