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I just tested the tap water and it is approximately 250 ppm which I understand indicates hard water. So, I should go ahead and fill the tub with this tap water and then adjust the pH to the required level? By the way - the softener that I have utilizes no salt at all - it is resin-based...

Is it best to fill my hot tub with hard or soft water for the first time of the season? I have a resin-based water softener that we use in our RV that will bring the water going into it to zero grains of hardness, or should I use untreated water out of the faucet? I plan to use the Bromine...

No scaling issues at all - I will just work on the pH and the TC. Thanks

It clearly states on the PoolMath calculator that adding baking soda will increase your pH, and my experience over the last week confirms that.

For some reason, I'm having a real problem balancing my pH and TA this season. I have a 400-gallon spa and use PoolMath to balance everything. I've been using the same routine for over five years now and have never had a problem - until now. I'm constantly chasing my tail trying to get the pH...

OK - thanks for your help. I'm like you, three months from now I will drain and refill the tub so I'll just focus on the pH instead of the TA.

I just filled my hot tub for the season and I'm having a heck of a time getting its pH and TA to the correct levels. I'm following the guidelines outlined in Nitro's article " How do I use Choline in my Spa (or pool). I'm trying to get my TA to 50 ppm like he recommends but when I do that my...

I went to my local WalMart a few months ago and picked one of these up for $2.99. Can't get much simpler and it works well. Swimming Pool/Spa Chlorine Bromine Flip Floater Chemical Tab Dispenser | F10008 - Walmart.com

Thanks!

I have read several posts in this thread that refer to storing regents in a fridge. If you do that does that extend the shelf-life past the 18 month mark? Also, is the fridge storage method good for all regents?

Thanks Dave for pointing this out. I will use the baking soda to work on getting the TA up. UPDATE: using Dave's product recommendations I was able to get pH down to 7.2 and TA to 20. Per PoolMath I added the recommended amount of baking soda and ran all jets for 30 minutes. TA went to 60...

Water balances out very well using PoolMath - all of the action items are spot on as far as obtaining the proper levels I need. Here is the one area that I'm having trouble with - I'm trying to get my TA to stay at 50 but my pH measures around 7.8 to 7.9. So, when I add the recommended level...

Thanks for pointing out the section of PoolMath that deals with bleach concentrates - I just didn't scroll down far enough to see it. I assume that the output results in the "Effects of Adding Chemicals" section is based upon the gallon size that is entered at the very top? Also, thanks for...

Our new spa (400 gallons & planned temp setting of 103) will be arriving this next week and I plan to implement the Bromine method outlined by Molson in the thread - How do I use Bromine in my spa? That posting refers to another thread about first balancing your water before implementing the...

We have just purchased a new Jacuzzi J355 and will be taking delivery of it in about 10 day - 2 weeks. In the meantime I have been studying up on the different water treatment methods/systems and trying to determine what will be best for us going forward. Also, our tub will come with a cover...