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Either system is easy to use and have advantages and disadvantages to both. Use what you feel more comfortable.Pool chlorine is not spa chlorine just keep that in mind. Forget about what you read (if any) about using bleach or anything else until you get water chemistry under your belt. Just use dichlor.Why do you think since you're using salt chlorine would be the best? Pools and spas require different things. Salt is fairly new in the pool game where trichlor has been around for years along with calcium hypochlorite (cal hypo). Bromine was the product people used in spas for years and still do. Try dichlor, if it works great; if not switch to bromine and if that doesn't work go to Baqua.
Go with minimum chlorine with AG+ (Nature2).Salt in your pool is simply a way of delivering chlorine.
Does the Nature 2 really reduce the chlorine needed, even if you have ozone? Is the added cost worth the reduction in the dichlor.
I had a post a week or two ago in regards to the N2 cartridge. Opinions vary greatly, but I'm sold on the N2 cartridge. It makes managing water VERY easy. It might not pay for the amount of dichlor you don't have to use, as dichlor is very inexpensive. But it saves my water in the case that I don't get dichlor added after a few days. And I can tell a difference in the "feel" of the water. Just my 2 cents though... Oh...and as far as bromine vs. dichlor? I've tried both, and to me, dichlor is the way to go. I use Dichlor, N2, and ozone. I shock with MPS every couple of weeks. My water is SO easy to manage....
As posted, personal preference affects this quite a bit.We started with Bromine, then switched to Clorine with the new tub. I like clorine, for me its easier, I take care of the water chemistry. The wife liked Bromine, because she has sensitve skin. Again, for me, bromine was harder to keep crystal clear but as you have probably heard, happy wife, happy life.Good luck
If you were using bromine did you realize that most bromine tablets are about 25% chlorine, which is slowly released? With a chlorine spa you add chlorine when you exit to sanitize but it dissipates quickly so the next time you go in there is a low chlorine level. In other words, sometimes bromine users sit in a higher level of chlorine than a chlorine user.
Vanguard, does that also apply to spas ?? My Arctic Onzen uses sea salt. I heard such good things about the salt water used in Arctic spas and now you tell me that my kids will be destroing my new cement paver patio when they splash water everywhere....and they will.